produced in cooperation with Juan Carmigniani and Pathé Cinema ; Films for the Humanities ; director, Jean Cazenave ; written and produced by Henri de Turenne
Films for the Humanities presentation ; Granada Television International ; made with the cooperation of the Wildfowl Trust, California Institute of Technology ; written by Michael Dearden and Jack Smith ; produced and directed by Jack Smith ; made in association with Norddeutscher Rundfunk