Warner Vision Entertainment ; a production of WNET/13 ; produced by Emile Ardolino and Judy Kinberg ; directed by Merrill Brockway ; narration written by Elizabeth Kendall
National Educational Television Radio Center in cooperation with the Institute for Special Musical Studies at the University of Southern California ; producer, Nathan Kroll ; director, Alexander Hammid ; producer, Nathan Kroll
producer, David Hestad ; editors, Frank Boll, David Hestad ; executive producer, Diane Kostecke ; [produced by WHA-TV in cooperation with the Wisconsin Department of Agriculture, Trade and Consumer Protection and the Wisconsin Energy Bureau]