| Signature mark | NL 174/0591 |
|---|---|
| Subject | Brief |
| Author |
Mach, Marie |
| Recipient |
Mach, Ernst
Mach, Louise |
| Title | Mach, Marie an Mach, Ernst und Mach, Louise |
| Note | Marie Mach ist die Schwester von Ernst Mach |
| Date | o.D. |
| Scope | 3 S. hs. |
| Rights notice | CC BY-SA 4.0 |