produced by the Coast Community College District in cooperation with Holt, Rinehart and Winston and City Colleges of Chicago ... [and others] ; producer, Ira R. Abrams ; script and additional narration by Napoleon A. Chagnon
produced by Green Lion Productions, Inc., in association with the Canadian Broadcasting Corporation, with the participation of Telefilm Canada and Société générale des industries culturelles (SOGIC) [and] National Film Board of Canada ; director, Anne Henderson ; writer, Gwynne Dyer ; producers, Marrin Canell, Catherine Mullins
a co-production by DLI. and Studio D, National Film Board of Canada production ; directed ... by Irene Lilienheim Angelico and Abbey Jack Neidik ; narration written by Irene Lilienheim Angelico, Gloria Demers ; associate director, Harald Lüders ; producers, Irene Lilienheim Angelico .. [and others].