found: I've got your number [MP] 1934:credits (screenplay, Sidney Sutherland)
found: Picador Porky [MP] 1937, 1992:credits (animation, Sid Sutherland)
found: Wabbit twouble [MP] 1941:credits (animation, Sid Suthewand)
found: Variety obituaries, 1963-1968:5/1/68 (Sidney E. Sutherland; d. 4/20/68; sound editor and animator)
found: Internet movie database, May 25, 2011(Sidney Sutherland; b. Aug. 7, 1901, Calif.; d. Apr. 20, 1968, Los Angeles, Calif.; screenwriter, animator, sound editor)
notfound: Theatre, film and television biographies, 1979;Notable names in the American theatre, 1976