Friedberg, Carl

Friedberg, Carl(1872–1955)

Muzička enciklopedija

Friedberg, Carl(1872–1955)

DEUMM Online

FRIEDBERG, Carl(1872–1955)

Algemene muziek encyclopedie

Friedberg, Carl(*1872)

Hugo Riemanns Musik-Lexikon

Friedberg, Carlo(*1872)

Dizionario universale dei musicisti