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U-boats Sunk In 1917, including: Sm U-28 (germany), Sm Ub-81, Sm Uc-41, Sm U-83, Sm Uc-29, Sm U-104, Sm Uc-42, Sm U-66, Sm U-69, Sm Ub-6, Sm Uc-1, Sm Uc-6, Sm Uc-7, Sm Uc-14, Sm Ub-18, Sm Ub-20, Sm Ub-27, Sm Ub-32, Sm Ub-36, Sm Ub-37, Sm Ub-39, Sm Ub-41 - Hephaestus Books
Hephaestus Books
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