| Signature mark | NL 174/0644 |
|---|---|
| Subject | Brief |
| Author |
[Avenarius, Richard?]
|
| Recipient |
Mach, Ernst
|
| Title | Avenarius, Richard an Mach, Ernst |
| Places | Zürich-Hottingen |
| Duration | 18.07.1883 |
| Scope | 1 S. hs. |
| Rights notice | CC BY-SA 4.0 |