# Otto Hartig

> German librarian

**Wikidata**: [Q16006653](https://www.wikidata.org/wiki/Q16006653)  
**Source**: https://4ort.xyz/entity/otto-hartig


## References

1. general catalog of BnF
2. Virtual International Authority File
3. [Source](https://kalliope-verbund.info/DE-611-BF-8563)
4. Integrated Authority File
5. CONOR.SI
6. VcBA (identifier)
7. Répertoire International des Sources Musicales
8. MAK
9. IdRef