# Ulfert Ricklefs
**Wikidata**: [Q95342005](https://www.wikidata.org/wiki/Q95342005)  
**Source**: https://4ort.xyz/entity/ulfert-ricklefs


## References

1. Catalog of the German National Library
2. Czech National Authority Database
3. BnF authorities
4. Integrated Authority File
5. Virtual International Authority File