| Signature mark | NL 174/0620 |
|---|---|
| Subject | Brief |
| Author |
Akademie der Wissenschaften <Wien>
|
| Recipient |
Mach, Ernst
|
| Title | Akademie der Wissenschaften |
| Places | Wien |
| Duration | 01.04.1892 |
| Scope | 1 S. hs. |
| Rights notice | CC BY-SA 4.0 |