Title: U-Boot-Abenteuer : sechs Jahre U-Boot-Fahrten /
Authors: Spiess, Johannes, 1888-
Publisher: Verlag Tradition Wilhelm Kolk,
Year: 1932
Subjects: World War, 1914-1918 Naval operations Submarine; World War, 1914-1918 Naval operations, German; World War, 1914-1918 Personal narratives, German