# Olav Hackstein
**Wikidata**: [Q91630762](https://www.wikidata.org/wiki/Q91630762)  
**Source**: https://4ort.xyz/entity/olav-hackstein


## References

1. BnF authorities
2. Czech National Authority Database
3. Catalog of the German National Library
4. Virtual International Authority File
5. CiNii Research
6. VIAF ID
7. NUKAT