found: How's your folks and my folks down in Norfolk town, c1925:t.p. (Cal De Voll)
found: OCLC, June 20, 2002: (hdgs.: De Voll, Cal, 1886-1970; DeVoll, Cal, 1886-1970; usage: Cal De Voll; De Voll; Cal DeVoll; Cal Devoll)
found: Can't you hear your Uncle Sammy calling, 1917:t.p. (Cal De Voll)
found: ASCAP biographical dictionary, 4rh edition(De Voll, Calvin Joseph; born Sept. 19, 1886, Omaha, Nebr.; died July 14, 1970, Ft. Worth, Tex.; composer, author, violinist; symphonic violinist and teacher in Chicago and Dallas; taught violin)
