Dieptebomwerper , Duits model 1937, Type 'G', kaliber afvuurpatroon 56 x 160/172 mm Dieptebomwerper , Duits model 1937, Type 'G', kaliber afvuurpatroon 56 x 160/172 mm How to fly the B-29 Superfortress : the official manual for the plane that bombed Hiroshima and Nagasaki / new introduction by Jeffrey L. Ethell