Reader's Digest World, ABC/Kane Productions co-produced with BBC in association with Trebitsch Produktion International and PBS ; produced by Bruce Reitherman ; written by Bruce Reitherman, Alex Gregory
a film by Florentine Films/Hott Productions, Inc. in association with the Clark Science Center and Smith College ; produced by Lawrence R. Hott, Tom Litwin, Diane Garey ; directed by Lawrence R. Hott ; written by Ken Chowder, Diane Garey
Bullfrog Films presents ; a film by Florentine Films/Hott Productions, Inc. in association with the Clark Science Center at Smith College ; produced by Lawrence R. Hott, Tom Litwin, Diane Garey ; directed by Lawrence R. Hott ; written by Ken Chowder, Diane Garey
a Siera Club presentation ; a film by Bonnie Kreps & Charlie Craighead ; co- producer and editor, Sandy Ostertag ; director, Bonnie Kreps ; written by Charlie Craighead