Tropical Rainforest
1992 · Writer
The Triumph of the West
1985 · Associate Producer
The Great British Drought
1976 · Producer
The First Signs of Washoe
1974 · Writer
The First Signs of Washoe
1974 · Producer
The Drifting of the Continents
1970 · Director
The Drifting of the Continents
1970 · Writer
The Drifting of the Continents
1970 · Producer
One Pair of Eyes
1967 · Director
Of Oozies and Elephants
Director
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