produced and directed by Stanley Nelson ; written by Marcia A. Smith ; a Firelight Media production for American Experience ; WGBH Boston ; WGBH Educational Foundation
directed, written, and produced by Robert Stone ; a Robert Stone film for PBS/American experience in association with BBC ; WGBH Educational Foundation and Robert Stone Productions
a film by Ambrica Productions, Inc. in association with the American Experience ; written and directed by Sue Williams ; WGBH-TV, Boston ; WGBH Educational Foundation