Siegfried Bergmann

1962

• [ ] Hydra - Legend and Reality (Director) 

1965

• [ ] Blossom and Insect (Director) 

1990

• [ ] The Ways of an Animal Filmmaker (Director) 

1962

• [ ] Hydra - Legend and Reality (Author) 

1965

• [ ] Blossom and Insect (Author) 

1990

• [ ] The Ways of an Animal Filmmaker (Himself)