↑Jewell, Richard B. (1994). "RKO Film Grosses, 1929-1951: the C.J. Tevlin ledger". Historical Journal of Film, Radio and Television. 14 (1): 37–49. doi:10.1080/01439689400260031.
↑Despite modern awareness of these uncredited singers, even some professional authors continue to ascribe singing to the actors, e.g. "capitalized on the stylized vocals of the radiant Virginia Mayo", in Frederick V. Romano, The Boxing Filmography: American Features, 1920-2003 (Jefferson NC: McFarland, 2004), 108; ISBN9780786417933
