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https://hu.wikipedia.org/wiki/Eisbär_farkasfalka
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https://uboat.net/ops/wolfpacks/79.html
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https://en.wikipedia.org/wiki/Wolfpack_Eisbär
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https://uboat.net/ops/wolfpacks/217.html
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https://d-nb.info/gnd/4037035-5
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GND: 4037035-5 |
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https://id.ndl.go.jp/auth/ndlna/00574637
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NDL: 00574637 |
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https://en.wikipedia.org/wiki/German_submarine_U-504
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https://uboat.net/boats/u504.htm
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https://en.wikipedia.org/wiki/German_submarine_U-459
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https://uboat.net/boats/u459.htm
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