# Karl Koydl
**Wikidata**: [Q112436502](https://www.wikidata.org/wiki/Q112436502)  
**Source**: https://4ort.xyz/entity/karl-koydl


## References

1. [Source](https://knihovnici.wikibase.cloud/wiki/Item:Q1573)
2. MyHeritage
3. Czech National Authority Database
4. Students of the Universities of Prague 1882–1945
5. Virtual International Authority File
6. Dictionary of Czech librarians