Letter | Description | Signature | Date |
---|---|---|---|
|
Joseph Schürmann
>
Ricordi
Napoli Source: Archivio Storico Ricordi |
LLET014791 > | No date |
|
Luigi Nono
>
B. Schott’s Söhne
Milano Source: Archivio Storico Ricordi |
LLET030603 > | 29/2/1988 |