http://es.wikipedia.org/wiki/John_Berry_(film_director)

Berry, Jack

Szold, Jak

Film Index International, 1997---(John Berry ; alternative name : Jack Berry ; b. 1917 ; direction, cast, scripting)

Internet movie database, 24-02-2005---(John Berry; b. 1917, New York, d. 1999, Paris (France); director, writer, actor, producer; blacklisted in Hollywood after making the documentary "The Hollywood ten"; b. name, Jak Szold)