Directing
National Geographic Specials
1965 · Director
Birds Do It, Bees Do It
1974 · Director
Hollywood: The Dream Factory
1972 · Producer
The Incredible Machine
1975 · Writer
The Wolf Men
1969 · Writer
Dear Mr. Gable
1968 · Executive Producer
National Geographic: The Volga
1977 · Producer
Grizzly!
1967 · Writer
National Geographic: Splendid Stones
1991 · Writer
