Döbber, Johannes

Däbber, Johannes(1866–1921)

Muzička enciklopedija

Döbber, Giovanni(1866–1921)

Dizionario universale dei musicisti

DÖBBER, Johannes(1866–1921)

Algemene muziek encyclopedie

Döbber, Johannes(1866–1921)

Hugo Riemanns Musik-Lexikon

Döbber, Johannes(1866–1921)

DEUMM Online

Doebber, Johannes(1866–1921)

Opernlexikon/Opera catalogue/Lexique des opéras/Dizionario operistico