Eberhard Rossler - The U-Boat: The Evolution and Technical History of German Submarines Cassell | 2001 | ISBN: 0304361208 | English | 386 pages | PDF | 198.99 MB
Axel Niestle, "German U-Boat Losses During World War II: Details of Destruction" English | 2014 | pages: 305 | ISBN: 1557506418, 1399082833, 1848322100 | EPUB | 37,2 mb