# Johannes Ullrich
**Wikidata**: [Q123310130](https://www.wikidata.org/wiki/Q123310130)  
**Source**: https://4ort.xyz/entity/johannes-ullrich-q123310130


## References

1. Integrated Authority File
2. [Source](https://www.openagrar.de/receive/openagrar_mods_00072352)
3. National Library of Israel Names and Subjects Authority File