A film by Robert Arnold ; a co-production of Robert Arnold and the Independent Television Service ; with funding provided by the Corporation for Public Broadcasting ; executive producer for ITVS, Sally Jo Fifer ; executive producer, Vivian Kleiman ; producer, Lindsay Sablosky ; director, producer, Robert Arnold
a Yocha Dehe Wintun Nation production ; produced and directed by David Mueller & Lynn Salt ; co-producers, Tashina Banks, Takeo Koshikawa ; writer/interviews, Lynn Salt
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
written, produced and directed by Linda Garmon ; a Nova production by the WGBH/Boston Science Unit in association with BBC-TV, NDR International Hamburg and Nederlandse Omroepprogramma Stichting