German battleship Gneisenau

For other ships of the same name, see Gneisenau.
Gneisenau
History
Nazi Germany
Name: Gneisenau
Namesake: August Neidhardt von Gneisenau[1]
Builder: Deutsche Werke
Laid down: 6 May 1935
Launched: 8 December 1936
Commissioned: 21 May 1938
Decommissioned: 1 July 1942
Fate: Sunk as a blockship 23 March 1945 and scrapped after the war.
General characteristics
Class and type: Scharnhorst-class battleship
Displacement:
  • Standard: 32,100 long tons (32,600 t)
  • Full load: 38,100 long tons (38,700 t)
Length: 234.9 m (771 ft)
Beam: 30 m (98 ft)
Draft: 9.9 m (32 ft)
Installed power: 165,930 PS (163,660 shp; 122,040 kW)
Propulsion: 3 Germania geared steam turbines
Speed: 31 knots (57 km/h; 36 mph)
Range: 6,200 nmi (11,500 km; 7,100 mi) at 19 knots (35 km/h; 22 mph)
Complement:
  • 56 officers
  • 1,613 enlisted
Armament:
Armor:
  • Belt: 350 mm (14 in)
  • Deck: 50 mm (2.0 in)
  • Turrets:200 to 360 mm (7.9 to 14.2 in)
  • Conning tower: 350 mm[2]
Aircraft carried: 3 Arado Ar 196A
Aviation facilities: 1 catapult

Gneisenau was a German capital ship, alternatively described as a battleship and battlecruiser, of Nazi Germany's Kriegsmarine. She was the second vessel of her class, which included one other ship, Scharnhorst. The ship was built at the Deutsche Werke dockyard in Kiel; she was laid down on 6 May 1935 and launched on 8 December 1936. Completed in May 1938, the ship was armed with a main battery of nine 28 cm (11 in) C/34 guns in three triple turrets, though there were plans to replace these weapons with six 38 cm (15 in) SK C/34 guns in twin turrets.

Gneisenau and Scharnhorst operated together for much of the early portion of World War II, including sorties into the Atlantic to raid British merchant shipping. During their first operation, the two ships sank the British auxiliary cruiser HMS Rawalpindi in a short battle. Gneisenau and Scharnhorst participated in Operation Weserübung, the German invasion of Norway. During operations off Norway, the two ships engaged the battlecruiser HMS Renown and sank the aircraft carrier HMS Glorious. Gneisenau was damaged in the action with Renown and later torpedoed by a British submarine, HMS Clyde, off Norway. After a successful raid in the Atlantic in 1941, Gneisenau and her sister put in at Brest, France. The two battleships were the subject of repeated bombing raids by the RAF; Gneisenau was hit several times during the raids, though she was ultimately repaired.

In early 1942, the two ships made a daylight dash up the English Channel from occupied France to Germany. After reaching Kiel in early February, the ship went into drydock. On the night of 26 February, the British launched an air attack on the ship; one bomb penetrated her armored deck and exploded in the forward ammunition magazine, causing serious damage and a large number of casualties. The repairs necessitated by the damage were so time consuming that it was determined to rebuild the ship to accommodate the 38 cm guns as originally intended. The 28 cm guns were removed and used as shore batteries. In 1943, Hitler ordered the cessation of conversion work, and on 27 March 1945, she was sunk as a blockship in Gotenhafen (Gdynia) in German-occupied Poland. She was eventually broken up for scrap in 1951.

Construction and configuration

Gneisenau as she appeared in February 1942

Gneisenau was ordered as Ersatz Hessen as a replacement for the old pre-dreadnought Hessen, under the contract name "E."[2] The Deutsche Werke in Kiel was awarded the contract, where the keel was laid on 6 May 1935.[3] The ship was launched on 8 December 1936, after which fitting-out work was begun.[4] The ship was completed in May 1938 and commissioned for sea trials on the 21st,[5] under the command of Kapitän zur See (KzS) Erich Förste.[6][5] The trials revealed a dangerous tendency to ship considerable amounts of water in heavy seas. This caused flooding in the bow and damaged electrical systems in the forward gun turret. As a result, she went back to the dockyard for extensive modification of the bow. The original straight stem was replaced with a raised "Atlantic bow."[7] A diagonal cap was fitted to the smoke stack to keep the main mast free of smoke.[8] The modifications were completed by September 1939, by which time the ship was finally fully operational.[7]

Gneisenau displaced 32,100 long tons (32,600 t) as built and 38,100 long tons (38,700 t) fully loaded, with a length of 234.9 m (770 ft 8 in), a beam of 30 m (98 ft 5 in) and a maximum draft of 9.9 m (32 ft 6 in). She was powered by three Germania geared steam turbines, which developed a total of 165,930 metric horsepower (163,660 shp; 122,041 kW) and yielded a maximum speed of 31.3 knots (58.0 km/h; 36.0 mph) on speed trials. Her standard crew numbered 56 officers and 1,613 enlisted men, though during the war this was augmented up to 60 officers and 1,780 men. While serving as a squadron flagship, Gneisenau carried an additional ten officers and 61 enlisted men.[2]

She was armed with nine 28 cm (11.1 in) L/54.5 guns arranged in three triple gun turrets: two superfiring turrets forward—Anton and Bruno—and one aft—Caesar. Her secondary armament consisted of twelve 15 cm (5.9 in) L/55 guns, fourteen 10.5 cm (4.1 in) L/65 and sixteen 3.7 cm (1.5 in) L/83, and initially ten 2 cm (0.79 in) anti-aircraft guns. The number of 2 cm guns was eventually increased to thirty-eight. Six 53.3 cm (21.0 in) above-water torpedo tubes, taken from the light cruisers Nürnberg and Leipzig, were installed in 1942.[2]

Service history

Gneisenau left Germany for a round of trials in the Atlantic in June 1939. As it was peacetime, the ship carried primarily practice ammunition, with only a small number of live rounds. She was back in Germany when war began in September 1939. On the 4th, the day after the British declaration of war, Gneisenau was attacked by fourteen Wellington bombers, though they made no hits.[9] In November, KzS Förste was replaced by KzS Harald Netzbandt.[6] The ship's first combat operation, under the command of Admiral Wilhelm Marschall, began on 21 November 1939;[9] the ship, in company with her sister Scharnhorst, the light cruiser Köln, and nine destroyers, was to patrol the area between Iceland and the Faroe Islands. The intent of the operation was to draw out British units and ease the pressure on the heavy cruiser Admiral Graf Spee, which was being pursued in the South Atlantic. Two days later, the German flotilla intercepted the auxiliary cruiser Rawalpindi.[10]

Scharnhorst fired first, followed by Gneisenau eight minutes later. The ship was quickly reduced to a burning wreck; Marschall ordered Scharnhorst to pick up survivors while he stood by in Gneisenau. The cruiser Newcastle arrived on the scene, which prompted Marschall to halt rescue operations and flee. Four allied capital ships, the British Hood, Nelson, Rodney, and the French Dunkerque followed in pursuit. The Germans reached Wilhelmshaven on 27 November, and on the trip both battleships incurred significant damage from heavy seas and winds.[9] After returning to Kiel, Gneisenau went into drydock for repairs for the storm damage. During the repairs, the bow was remodeled a second time to incorporate additional flare and sheer, in an attempt to improve her seaworthiness. Gneisenau went into the Baltic for trials on 15 January 1940, after the completion of the refit. Her voyage back to the North Sea was blocked by ice in the Kiel Canal until 4 February.[11]

Operation Weserübung

Gneisenau in port

Gneisenau was assigned to the forces participating in Operation Weserübung, the invasion of Denmark and Norway. She and her sister were the covering force for the assaults on Narvik and Trondheim (Flag Officer Vize Admiral Günther Lütjens). The two ships left Wilhelmshaven on the morning of 7 April, along with the heavy cruiser Admiral Hipper and fourteen destroyers. The cruiser and destroyers carried the assault forces for Narvik and Trondheim, while Gneisenau and Scharnhorst provided cover for them.[11] Later that day, at around 14:30, the three ships came under attack by a force of British bombers, though the bombers failed to make any hits.[12] On the morning of 8 April, the destroyer Z11 Bernd von Arnim encountered the British destroyer Glowworm. Before being sunk, Glowworm rammed Admiral Hipper, though the latter was not seriously damaged. The crews of the two battleships went to battle stations, though they did not take part in the brief engagement. At 21:00, Gneisenau and Scharnhorst took up a position west of the Vestfjorden to provide distant cover to both of the landings at Narvik and Trondheim.[11]

At 04:30 on the 9th, Gneisenau located the British battlecruiser Renown with her Seetakt radar; the call to battle stations rang out on both Gneisenau and Scharnhorst, though it was Renown that fired first, at 05:05.[11] Gneisenau scored two hits on Renown; the first failed to explode and the second exploded on her upper deck and damaged the radio equipment. Gneisenau and Scharnhorst then turned to disengage.[13] Almost simultaneously, two of Renown's 15 in (38.1 cm) shells struck Gneisenau. One shell hit the director tower and passed through it without exploding; regardless, it cut several cables and killed one officer and five enlisted men. The second shell disabled the rear turret. This prompted Gneisenau to cease firing and increase speed in order to break away from Renown. Vice Admiral Wilhelm Marschall feared that the destroyers escorting Renown could be used to make torpedo attacks against his unescorted battleships.[11] In the course of the action, Gneisenau fired sixty 28 cm and eight 15 cm rounds. During the high-speed escape, both Gneisenau and Scharnhorst were flooded by significant quantities of water over their bows, which caused problems in both of their forward gun turrets.[14]

Admiral Hipper rejoined the two battleships off Trondheim on the morning of 11 April, and the three ships returned to Wilhelmshaven, arriving the following day. There, the damage incurred during the engagement with Renown was repaired. She was then drydocked in Bremerhaven for periodic maintenance on 26–29 April.[15] The ship was to go to the Baltic following the completion of repairs,[16] but on the morning of 5 May, while steaming at 22 knots (41 km/h; 25 mph) off the Elbe estuary, Gneisenau detonated a magnetic mine about 21 m (68 ft 11 in) off the port rear quarter and 24 m (78 ft 9 in) below the hull. The explosion caused significant damage to the hull and flooded several compartments, which caused the ship to take on a half-degree list to port. The concussive shock from the blast damaged many internal and topside components, including the starboard low-pressure turbine and the rear rangefinders. Repairs were effected in a floating drydock in Kiel from 6 to 21 May. A brief shakedown cruise followed in the Baltic, and by the 27th, she was back in Kiel at full combat readiness.[15]

Gneisenau and Scharnhorst left Wilhelmshaven on 4 June to return to Norway. They were joined by Admiral Hipper and four destroyers.[15] The purpose of the sortie was to interrupt Allied resupply efforts to the Norwegians and to relieve the pressure on German troops fighting in Norway.[17] On 7 June, the squadron rendezvoused with the tanker Dithmarschen to refuel Admiral Hipper and the four destroyers.[15] The next day, the trawler Juniper was discovered and sunk, along with the oil tanker Oil Pioneer.[18] The Germans then launched their Arado 196 float planes to search for more Allied vessels. Admiral Hipper and the destroyers were sent to destroy Orama, a 19,500-long-ton (19,800 t) passenger ship, while Atlantis, a hospital ship, was allowed to proceed unmolested. Admiral Marschall detached Admiral Hipper and the four destroyers to refuel in Trondheim, while he would steam to the Harstad area.[15]

HMS Glorious photographed in May 1940 operating off Norway

At 17:45, the German battleships spotted the British aircraft carrier Glorious and two escorting destroyers, Ardent and Acasta, at a range of some 50,000 m (55,000 yd). Scharnhorst was closer and therefore fired first.[15] Scharnhorst had some boiler difficulty, which reduced her speed to 29 knots (54 km/h; 33 mph). This allowed Gneisenau to overtake her sister during the action.[19] Although the destroyers attempted to cover Glorious with smoke screens, the German battleships used their Seetakt radar to assist the gunlaying. In less than an hour's shooting, Glorious was reduced to a burning hulk. Gneisenau then turned her fire on Acasta, while Scharnhorst dispatched Ardent. Before Acasta was sunk, she fired a spread of torpedoes at Gneisenau, which the latter successfully evaded. One of them struck Scharnhorst, however, and caused serious damage. After all three British ships had been sunk, Marschall withdrew his force to Trondheim to conduct emergency repairs to Scharnhorst. In the meantime, Marschall sortied with Gneisenau, Admiral Hipper, and four destroyers, though after two days he returned to Trondheim when it became clear that the British convoys were too heavily guarded.[20]

Admiral Günther Lütjens replaced Marschall as the commander of the squadron, and on 20 June he sortied with Gneisenau, Admiral Hipper, and four destroyers in the direction of Iceland. His intention was to give the impression he was attempting to break out into the Atlantic, to draw British attention away from Scharnhorst as she made the return voyage to Germany. About 40 nmi (74 km; 46 mi) northwest of Halten, however, the submarine Clyde torpedoed Gneisenau. The torpedo hit the ship in the bow, just forward of the splinter belt, and caused serious damage. The ship took on a significant amount of water in the two forward watertight compartments, and she was forced to return to Trondheim at reduced speed.[21] In Trondheim, the repair ship Huascaran effected temporary repairs that permitted the ship to return to Kiel on 25–27 July, escorted by Admiral Hipper, Nürnberg, four destroyers, and six torpedo boats. A strong force from the British Home Fleet attempted to intercept the flotilla, but it failed to find it. Upon arrival, Gneisenau went into drydock at the Howaldtswerke dockyard for five months of repair work.[22] In August, the ship's commander was replaced by KzS Otto Fein, who would captain the ship for the majority of her active wartime career.[6]

Operation Berlin

Scharnhorst joined Gneisenau, in preparation for Operation Berlin, the planned breakout into the Atlantic Ocean designed to wreak havoc on the Allied shipping lanes.[22] Severe storms caused damage to Gneisenau, though Scharnhorst was undamaged. The two ships were forced to put into port during the storm: Gneisenau went to Kiel for repairs while Scharnhorst put into Gdynia (Gotenhafen). Repairs were quickly completed, and on 22 January 1941, the two ships, again under the command of Admiral Lütjens, left port for the North Atlantic. They were detected in the Skagerrak and the heavy units of the British Home Fleet deployed to cover the passage between Iceland and the Faroes. The Germans' radar detected the British at long range, which allowed Lütjens to avoid the British patrols, with the aid of a squall. By 3 February, the two battleships had evaded the last British cruiser patrol, and had broken into the open Atlantic.[23]

Gneisenau after her second bow alteration in 1942.

On 6 February, the two ships refueled from the tanker Schlettstadt south of Cape Farewell. Shortly after 08:30 on 8 February, lookouts spotted convoy HX-106, though it was escorted by the battleship Ramillies. Lütjens' orders prohibited him from engaging Allied capital ships, and so the attack was called off. Scharnhorst's commander, KzS Hoffmann, however, closed to 23,000 m (25,000 yd) in an attempt to lure Ramillies away from the convoy so that Gneisenau could attack the convoy. Lütjens ordered Hoffmann to rejoin the flagship immediately. The two battleships steamed off to the northwest to search for more shipping. On 22 February, the pair spotted an empty convoy sailing west, though it dispersed at the appearance of the battleships. Gneisenau sank three ships, and along with a fourth destroyed by Scharnhorst, the pair accounted for 25,784 GRT of Allied shipping.[23]

Lütjens then decided to move to a new area, as the surviving members of the dispersed convoy had sent distress signals. He chose the Cape Town-Gibraltar convoy route, and positioned himself to the northwest of Cape Verde. The two ships encountered another convoy, escorted by the battleship Malaya, on 8 March. Lütjens again forbade an attack, though he shadowed the convoy and directed U-boats to attack it. A pair of U-boats sank a total of 28,488 GRT of shipping on the night of 7–8 March. Malaya turned on the two battleships and closed to 24,000 m (26,000 yd), well within the range of the Germans' guns, but Lütjens refused to be drawn into an engagement.[24] He instead turned toward the mid-Atlantic, where the two ships refueled from the tankers Uckermark and Ermland on 12 March.[25]

On 15 March, the two battleships, with the two tankers in company, encountered a dispersed convoy in the mid-Atlantic. Gneisenau captured three tankers and sank a fourth, totaling 20,139 GRT of shipping. The next day, stragglers from a convoy were sighted. Gneisenau sank seven ships for 26,693 GRT, while her sister accounted for six vessels for 35,088 long tons (35,651 t).[26] One of the surviving ships radioed the location of the German battleships, which summoned the powerful British battleships Rodney and King George V. Scharnhorst and Gneisenau used their high speed to escape in a squall, and the intervention by the British battleships convinced Lütjens that the chances of further success were small. He therefore decided to head for Brest in occupied France, which the ships reached on 22 March. She then entered drydock for periodic maintenance.[27]

Air attacks in Brest

After arriving in Brest, Gneisenau was the subject of repeated British air raids. The first attack took place on the night of 30–31 March, and a second occurred on 4–5 April. During the second raid, a 227 kg (500 lb) armor-piercing (AP) bomb narrowly missed the ship. As a result of the attacks, the ship was moved out of the dry dock and moved to the harbor.[27] On 6 April, the ship was attacked by British torpedo bombers, which managed to score a single hit.[28] The Bristol Beaufort that struck the ship was piloted by Flying Officer Kenneth Campbell.[29] The torpedo struck Gneisenau in the vicinity of the rear main battery turret. Some 3,050 t (3,000 long tons) of water flooded the ship and caused a 2 degree list to starboard. The flooding also disabled several components of the ship's propulsion system. The explosion caused significant destruction to the side plating as well as the starboard and centerline propeller shafts. The concussive shock also caused widespread damage to the ship's electronic components. A salvage tug came alongside to assist in the pumping effort. Following the attack, Gneisenau returned to the drydock for repairs.[30]

Three days later, on the night of 9–10 April, several British bombers dropped around 25 t (25 long tons) of 227 kg AP bombs on the ship, four of which hit. All four hit the starboard side of the forward superstructure. Two of the bombs exploded on the main armor deck while the other two failed to detonate. The attack killed 72 initially and wounded 90, of which 16 later died of their injuries. The bombs slightly damaged the main armor deck and caused some structural damage on the starboard side. It was decided to make alterations to the ship while she was drydocked for repairs; these included the installation of fourteen additional 2 cm anti-aircraft guns and six 53.3 cm torpedo tubes amidships. The aircraft hangar was rearranged, and the catapult that had been mounted on top of it was removed. The length of repairs and modifications precluded participation in Operation Rheinübung, the sortie by the new battleship Bismarck in May 1941. The British continued to attack the ship in drydock, though no further damage was done.[31] On 6 February 1942, a bomb fell close to the ship, but caused no damage.[32]

Operation Cerberus

On 12 January 1942, the German Naval Command, in a conference with Hitler, made the decision to return Gneisenau, Scharnhorst, and the heavy cruiser Prinz Eugen to Germany. The intention was to deploy the vessels to Norway to interdict Allied convoys to the Soviet Union. The so-called "Channel Dash", codenamed Operation Cerberus, would avoid the increasingly effective Allied radar and patrol aircraft in the Atlantic. Vice Admiral Otto Ciliax was given command of the operation. In early February, minesweepers swept a route through the English Channel, though the British failed to detect the activity.[33]

Gneisenau at sea

At 23:00 on 11 February, Scharnhorst, Gneisenau, and Prinz Eugen left Brest. They entered the Channel an hour later; the three ships sped at 27 knots (50 km/h; 31 mph), hugging the French coast along the voyage.[33] The British failed to detect their departure, as the submarine that had been tasked with observing the port had withdrawn to recharge its batteries.[34] By 06:30, they had passed Cherbourg, at which point they were joined by a flotilla of torpedo boats.[33] The torpedo boats were led by Kapitän Erich Bey, aboard the destroyer Z29. General der Jagdflieger (General of Fighter Force) Adolf Galland directed Luftwaffe fighter and bomber forces (Operation Donnerkeil) during Cerberus.[35] The fighters flew at masthead-height to avoid detection by the British radar network. Liaison officers were present on all three ships. German aircraft arrived later to jam British radar with chaff.[33] By 13:00, the ships had cleared the Strait of Dover, though half an hour later, a flight of six Swordfish torpedo bombers, with Spitfire escort, attacked the Germans. The British failed to penetrate the Luftwaffe fighter shield and all six Swordfish were destroyed.[36][37] Several more attacks were launched over the next two hours, but the Luftwaffe screen repulsed them all.[38]

Five British destroyers mounted an attack on the German squadron at 16:17. The ships attempted to close to torpedo range, though heavy seas and overcast conditions hampered their attack. Gneisenau and Prinz Eugen inflicted serious damage to the destroyer Worcester.[39] At 19:55, Gneisenau detonated a magnetic mine off Terschelling. The mine exploded just forward of the rear gun turret but caused only minor damage. Slight flooding was quickly stopped, though the shock disabled the center turbine. The ship stopped for less than 30 minutes before resuming the voyage; by 03:50, Gneisenau and two destroyers reached Helgoland. After being joined there by Prinz Eugen, the ships left for Kiel, but thick ice in the canal forced the ships to stop in Brunsbüttel. While maneuvering in port, Gneisenau struck a submerged wreck. The collision tore a hole in the hull and caused some minor flooding.[40] Gneisenau reached Kiel the following day, where she went into a floating dry dock at the Deutsche Werke dockyard.[32]

Fate

Top:Aerial reconnaissance photo of Gneisenau in dry dock, March 1942. Bottom: Gneisenau's 28 cm turret Caesar at Austrått Fort, Norway.

Repair work on Gneisenau was completed by 26 February 1942, and she was scheduled to deploy to Norway on 6 March. Despite the fact that she was still in dry dock, her ammunition stores had been restocked and she was prepared for a short round of trials before her departure. On the night of 26–27 February, however, the British launched a heavy air raid on the ship.[41] The ship was hit by a single bomb in her forecastle that penetrated the armored deck and exploded.[42] Red-hot bomb fragments ignited propellant charges in the forward turret and caused a tremendous explosion. The turret was thrown off its mount and the entire bow section was burned out.[32] The crew partially flooded the magazine to prevent a more catastrophic explosion. The blast killed 112 men and wounded 21 others.[43]

The extensive damage convinced the Naval Staff to rebuild Gneisenau to mount the six 38 cm guns originally planned, rather than repair the ship. The damaged bow section was removed in order to attach a lengthened bow, which would correct the decrease in freeboard that would have been caused by the heavier 38 cm guns.[44] On 4 April, the ship went to Gotenhafen, escorted by the training ship Schlesien and the icebreaker Castor.[32] She was formally decommissioned on 1 July.[42] Her crew were paid off and redeployed to the U-boat arm.[45]

By early 1943, the ship had been sufficiently repaired to begin the conversion process, but Hitler, angered by the failure of German surface raiders at the Battle of the Barents Sea in December 1942 ordered the cessation of all work.[46] Gneisenau was disarmed and her 28 cm and 15 cm gun turrets were used in shore batteries.[42] Turret Caesar was installed in a coastal fortress in Trondheim as the coastal battery Orlandet.[5]

Gneisenau remained unused in Gotenhafen until the end of the war. As the Red Army advanced on the city, the remaining crew took the ship out to the entrance of the harbor and sank the vessel as a blockship on 27 March 1945. In 1947, the Polish government ordered the ship be removed, and initial salvage operations began.[46][5] The ship was sealed and refloated on 12 September 1951 then completely scrapped,[32] though it is believed that some of her steel was used in the construction of Polish merchant vessels.[47] She was the largest ship raised at the time. Norway offered to return the turret from Trondheim in 1979, though the offer was rejected.[5] The gun turret was instead preserved as a museum in Norway.[42]

Notes

  1. ↑ Schmalenbach, p. 221.
  2. 1 2 3 4 Gröner, p. 31.
  3. ↑ Campbell, p. 43.
  4. ↑ Williamson, pp. 14–15.
  5. 1 2 3 4 5 Gröner, p. 32.
  6. 1 2 3 Williamson, p. 19.
  7. 1 2 Williamson, p. 15.
  8. ↑ Breyer, p. 15.
  9. 1 2 3 Garzke & Dulin, p. 134.
  10. ↑ Williamson, pp. 8–9.
  11. 1 2 3 4 5 Garzke & Dulin, p. 135.
  12. ↑ Williamson, p. 9.
  13. ↑ Konstam, p. 39.
  14. ↑ Garzke & Dulin, p. 136.
  15. 1 2 3 4 5 6 Garzke & Dulin, p. 137.
  16. ↑ Williamson, p. 16.
  17. ↑ Williamson, p. 10.
  18. ↑ Rohwer, p. 26.
  19. ↑ Howland.
  20. ↑ Garzke & Dulin, pp. 137–138.
  21. ↑ Garzke & Dulin, pp. 138–139.
  22. 1 2 Garzke & Dulin, p. 139.
  23. 1 2 Garzke & Dulin, p. 140.
  24. ↑ Garzke & Dulin, pp. 140–142.
  25. ↑ Garzke & Dulin, p. 142.
  26. ↑ Garzke & Dulin, pp. 142–143.
  27. 1 2 Garzke & Dulin, p. 143.
  28. ↑ Breyer, p. 30.
  29. ↑ Ashworth, p. 33.
  30. ↑ Garzke & Dulin, pp. 143–144.
  31. ↑ Garzke & Dulin, pp. 144–145.
  32. 1 2 3 4 5 Breyer, p. 34.
  33. 1 2 3 4 Garzke & Dulin, p. 146.
  34. ↑ Williamson, pp. 11–12.
  35. ↑ Hooton, pp. 114–115.
  36. ↑ Hooton, p. 114.
  37. ↑ Weal, p. 17.
  38. ↑ Garzke & Dulin, p. 147.
  39. ↑ Garzke & Dulin, pp. 147–148.
  40. ↑ Garzke & Dulin, pp. 148–149.
  41. ↑ Garzke & Dulin, pp. 149–150.
  42. 1 2 3 4 Williamson, p. 18.
  43. ↑ Garzke & Dulin, p. 150.
  44. ↑ Garzke & Dulin, pp. 150–151.
  45. ↑ Garrett, p. 120, 122.
  46. 1 2 Garzke & Dulin, p. 153.
  47. ↑ Garrett, p. 121.

References

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