# Otto Klein
**Wikidata**: [Q95150219](https://www.wikidata.org/wiki/Q95150219)  
**Source**: https://4ort.xyz/entity/otto-klein-q95150219


## References

1. Czech National Authority Database
2. Database of the Military Historical Archive
3. [The Fine Art Archive](https://cs.isabart.org/person/106974)
4. [Database of the Military Historical Archive](http://www.vuapraha.cz/soldier/20480405)
5. [Database of the Military Historical Archive](http://www.vuapraha.cz/soldier/20162911)
6. Virtual International Authority File
7. [Database of the Military Historical Archive](https://www.vuapraha.cz/legionari/46813)
8. Database of members of the Czechoslovak Republic of military units abroad for the World War II
9. The Fine Art Archive