# Hermann Otto Geissler
**Wikidata**: [Q41803217](https://www.wikidata.org/wiki/Q41803217)  
**Source**: https://4ort.xyz/entity/hermann-otto-geissler


## References

1. Integrated Authority File
2. Catalog of the German National Library
3. Virtual International Authority File
4. [archINFORM](https://www.archinform.net/service/wd_aiarch.php)