1
Published: [1964]
Superior document: Sonderdruck aus Verdi - Bollettino dell'Istituto di Studi Verdiani ; Vol. 2, n. 5
2
Published: 1940
Superior document: Biblioteca de la "Rassegna Musicale" 1
3
4
Published: 1956
5
Published: 1980
6
Published: ©, 1960
7
Published: 1958
Superior document: Accademia Musicale Chigiana [15]
8
Published: 1959
Superior document: Accademia Musicale Chigiana [16]
9
Published: 1960
Superior document: Accademia Musicale Chigiana [17]