# Otto Olzien
**Wikidata**: [Q95251002](https://www.wikidata.org/wiki/Q95251002)  
**Source**: https://4ort.xyz/entity/otto-olzien


## References

1. BnF authorities
2. Czech National Authority Database
3. Catalog of the German National Library
4. Virtual International Authority File
5. [Source](https://kalliope-verbund.info/DE-611-BF-61640)
6. National Library of Israel Names and Subjects Authority File