U Boot Type VIIC 41 Revell 1:144 Step by Step build - YouTube
Type VIIC/41 - U-boat Types - German U-boats of WWII - Kriegsmarine - uboat.net
U-Boat 1936-45 (Type VIIA, B, C and Type VIIC/41): An insight into the design, construction and operation of the most feared German U-boat of World War 2 (Owners' Workshop Manual): Gallop, Alan: