# Ludwik Gelberg
**Wikidata**: [Q95274788](https://www.wikidata.org/wiki/Q95274788)  
**Source**: https://4ort.xyz/entity/ludwik-gelberg


## References

1. Integrated Authority File
2. Czech National Authority Database
3. Catalog of the German National Library
4. Deutsche Biographie
5. Virtual International Authority File
6. CiNii Research
7. NUKAT
8. National Library of Portugal
9. Bibliography of the History of the Czech Lands