# Nikolaus Kelen
**Wikidata**: [Q107164949](https://www.wikidata.org/wiki/Q107164949)  
**Source**: https://4ort.xyz/entity/nikolaus-kelen


## References

1. [Source](https://cp.tu-berlin.de/person/1923)
2. Catalog of the German National Library
3. [Source](https://gepris-historisch.dfg.de/person/5105964)