U Boat Libro

Fratelli Melita Editori

U-Boat. I Sommergibili Tedeschi, Tecnica Ed Evoluzione

US Naval Institute Press

The U-Boat Commanders: Knight's Cross Holders 1939-1945

Haynes

U-boat Owners Workshop Manual: 1936-45 Type Viia, B, C and Viic/41, an Insight into the History, Development, Production and Role of the German ... feared World War 2 German Type VIIC U-boat.

CREATESPACE

U-Boat! (Vol. IV)                                

U Boat 977                                      

Sapere Books

U-Boat Killer: Fighting the U-Boats in the Battle of the Atlantic: 1

CreateSpace Independent Publishing Platform

U-Boat!: The U-Boat War by the Men Who Lived It: Volume 1

Independently published

U-Boat Captain: Solitaire WW2 Wargame            

Osprey Publishing

The U-Boat War: A Global History 1939–45        

Nutrimenti

Tontopedia navalis. Cento straordinarie cazzate in barca a vela