Colombo, Ruggiero Eugenio di Rodolpho (Russ)

Columbo, Russ(1908–1934)

MGG Online

Knut Holtsträter

Columbo, Russ(1908–1934)

Tin Pan Alley: An encyclopedia of the golden age of American song

Columbo, Russ(1908–1934)

Encyclopedia of recorded sound

Columbo, Russ di(1908–1934)

Hollywood songsters: Singers who act and actors who sing—A biographical dictionary