PBS ; produced and directed by Riva Freifeld ; written by Ken Chowder ; co-produced by Amy Brown ; a Riva Productions film for American Experience ; WGBH Boston
directed by Edgar Wolf ; in cooperation with Hans Wolfgang, Viola Shu ; producer, Saskia Kress ; produced by Filmtank in cooperation with SWR, NDR and ARTE ; a Films for the Humanities & Sciences presentation