Hans Bittmann: Sound Engineer (Sound)1932-03-14

Hans Bittmann: Sound (Sound)1936-01-02

Hans Bittmann: Sound (Sound)1937-01-01

Hans Bittmann: Sound (Sound)1940-12-12

Hans Bittmann: Sound (Sound)1931-04-17

Hans Bittmann: Sound (Sound)1932-03-24

Hans Bittmann: Sound (Sound)1950-04-26

Hans Bittmann: Sound (Sound)1941-04-12

Hans Bittmann: Sound Engineer (Sound)1943-01-14

Hans Bittmann: Sound (Sound)1936-10-24