# Ludwig Coellen

> theoretician

**Wikidata**: [Q19754021](https://www.wikidata.org/wiki/Q19754021)  
**Source**: https://4ort.xyz/entity/ludwig-coellen


## References

1. Czech National Authority Database
2. Catalog of the German National Library
3. archINFORM
4. [Source](https://kalliope-verbund.info/DE-611-BF-1002)
5. Virtual International Authority File
6. CONOR.SI
7. [archINFORM](https://www.archinform.net/service/wd_aiarch.php)