Partridge Productions ; written by Phil Agland ; produced by Phil Agland, Michael Rosenberg ; directed by David Heeley ; a presentation of WNET/Thirteen in association with the Nature Conservancy
a production of Public Affairs Television, Inc. ; written by Bill Moyers, David Brancaccio, Judy Stoeven Davies ; directed by Mark Ganguzza ; a presentation of Thirteen/WNET New York
a co-production of David Sutherland Productions, Inc. and Frontline in association with The Independent Television Service ; written, produced, directed and edited by David Sutherland