# Otto Ernst Hartmann
**Wikidata**: [Q55124626](https://www.wikidata.org/wiki/Q55124626)  
**Source**: https://4ort.xyz/entity/otto-ernst-hartmann


## References

1. Integrated Authority File
2. [Source](https://www.deutsche-biographie.de/sfz27918.html)
3. NUKAT
4. Virtual International Authority File