Wolff, Erich J.

WOLFF, Erich(1874–1913)

Algemene muziek encyclopedie

Wolff, Erich J.(1874–1913)

Hugo Riemanns Musik-Lexikon

Wolff, Erich J.(1874–1913)

Opernlexikon/Opera catalogue/Lexique des opéras/Dizionario operistico

Wolff, Erich Jaques(1874–1913)

The 20th century violin concertante: A repertoire catalogue