# Karl Hartmann
**Wikidata**: [Q95339568](https://www.wikidata.org/wiki/Q95339568)  
**Source**: https://4ort.xyz/entity/karl-hartmann-q95339568


## References

1. Integrated Authority File
2. Catalog of the German National Library
3. Virtual International Authority File
4. National Library of Israel Names and Subjects Authority File