produced by John Marshall and Sue Marshall-Cabezas ; directed and edited by Adrienne Miesmer and John Marshall ; a co-production of Documentary Educational Resources and Public Broadcasting Associates
Documentary Educational Resources presents a Films Incorporated presentation ; produced by the Film Study Center of the Peabody Museum of Harvard University ; directed by John Marshall in collaboration with Robert Gardner
produced by the National Geographic Society and WQED, Pittsburgh ; executive producers, Dennis B. Kane, Thomas Skinner ; produced and photographed by Stanley Breeden, Belinda Wright ; written by Stanley Breeden
Ironbound Films presents ; a film funded by National Science Foundation ; directed by Seth Kramer, Daniel A. Miller, Jeremy Newberger ; written by Daniel A. Miller
a co-production of Blair Brothers Productions and WGBH, Boston ; writer, Lawrence Blair ; directed by Lorne Blair ; Beyond the ring of fire directed by David Fanning ; produced by Lawrence and Lorne Blair
produced by John Marshall and Sue Marshall-Cabezas ; directed and edited by Adrienne Miesmer and John Marshall ; a co-production of Documentary Educational Resources and Public Broadcasting Associates
a Mitchell Beazley Television, RM Arts/Channel Four co-production in association with the Nigerian Television Authority ; written and presented by Basil Davidson ; produced by John Percival ; directed by John Percival, Christopher Ralling, Andrew Harries, and Mick Csaky