Koch, Friedrich Ernst

Koch, Federico(*1862)

Dizionario universale dei musicisti

Koch, Friedr. E.(1862–1927)

Opernlexikon/Opera catalogue/Lexique des opéras/Dizionario operistico

Koch, Friedrich E.(1862–1927)

Hugo Riemanns Musik-Lexikon

KOCH, Friedrich Ernst(1862–1927)

Algemene muziek encyclopedie

Koch, Friedrich Ernst(1862–1927)

Muzička enciklopedija

Koch, Friedrich Ernst(1862–1927)

DEUMM Online

Koch, Friedrich Ernst(1862–1927)

The 20th century violin concertante: A repertoire catalogue