# Karl Otto Hartmann

> born 1861; died 1934

**Wikidata**: [Q54859490](https://www.wikidata.org/wiki/Q54859490)  
**Source**: https://4ort.xyz/entity/karl-otto-hartmann-q54859490


## References

1. Catalog of the German National Library
2. Czech National Authority Database
3. Virtual International Authority File
4. [Open Library](https://openlibrary.org/works/OL2328576A)
5. [Source](http://datos.bne.es/persona/XX5560884.html)
6. CONOR.SI
7. VIAF ID
8. Catalogue of the Library of the Pontifical University of Saint Thomas Aquinas
9. NUKAT