found: Witness, c1985:credits (Jan Rubeš)
found: Internet Movie Database(b. 6 June 1920, St. Volyne, Czechoslovakia; singer, actor)
found: CBC News website, viewed July 1, 2009:article published June 30, 2009 (Jan Rubes; b. July 6, 1920 in Volyne, Czechoslovakia; died at 89, announced on Tuesday [June 30]; emigrated to Canada in 1948; bass singer who was an original member of the Opera Festival Company of Toronto, which later became the Canadian Opera Company; Czech-born Canadian opera singer, actor, broadcaster)
found: Wikipedia, June 3, 2024(Jan Rubeš; Jan Ladislav Rubeš; b. June 6, 1920 in Volyně, Czechoslovakia; d. June 29, 2009 in Toronto, Ont.)