| Signature mark | NL 174/2018 |
|---|---|
| Subject | Brief |
| Author |
Mach, Ernst
|
| Recipient |
Mach, Ludwig
|
| Title | Mach, Ernst an Mach, Ludwig |
| Places | Wien |
| Duration | 23.01.1901 |
| Scope | 1 S. ms. |
| Rights notice | CC BY-SA 4.0 |