found: Spike Jones presents a Xmas spectactular, 1958:container (George Rock)
found: Jones, Spike. Let's sing a song of Christmas, 1998, p1956:insert (George Rock, trumpet, vocals)
found: Internet Movie Database, December 1, 2014(George Rock; born October 11, 1919, Farmer City, Illinois, died April 12, 1988, Champaign, Illinois; actor)
found: Wikipedia, December 1, 2014(George Rock; born October 11, 1919, died April 12, 1988; trumpet player and occasional singer with Spike Jones and his City Slickers)