| Letter | Description | Signature | Date |
|---|---|---|---|
|
Guido Valcarenghi
>
Elsa Respighi Olivieri Sangiacomo
No place Source: Archivio Storico Ricordi |
LLET017594 > | No date |
|
Elsa Respighi Olivieri Sangiacomo
>
Ricordi
No place Source: Archivio Storico Ricordi |
LLET027936 > | No date |