المؤلفون: Urbanke, Axel, 1961- author.
مصطلحات موضوعية: World War, 1939-1945 -- Naval operations -- Submarine., World War, 1939-1945 -- Naval operations, German., Submarines (Ships) -- Germany -- History -- 20th century., Tankers -- Germany -- History -- 20th century., CD-ROMs.