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
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
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