# Ferdinand Ullrich
**Wikidata**: [Q59712859](https://www.wikidata.org/wiki/Q59712859)  
**Source**: https://4ort.xyz/entity/ferdinand-ullrich


## References

1. BnF authorities
2. Czech National Authority Database
3. NUKAT
4. Virtual International Authority File
5. ADAGP directory
6. National Library of Israel Names and Subjects Authority File