# Siegfried Hartmann
**Wikidata**: [Q28009040](https://www.wikidata.org/wiki/Q28009040)  
**Source**: https://4ort.xyz/entity/siegfried-hartmann-q28009040


## References

1. Czech National Authority Database
2. [Source](http://viaf.org/viaf/data/viaf-20170101-links.txt.gz)
3. Virtual International Authority File