Janus Films ; Black Sand Productions presents ; a film by Robert Epstein and Richard Schmiechen ; produced by Richard Schmiechen ; directed by Robert Epstein ; narration writers, Judith Coburn and Carter Wilson ; a production of Robert Epstein & Richard Schmiechen and the Television Laboratory at WNET/Thirteen
Bullfrog Films presents ; a Moira Productions film for Community Works/California ; written, directed and edited by Tom Weidlinger ; produced by Ruth Morgan