# Josef D. Černý
**Wikidata**: [Q55172066](https://www.wikidata.org/wiki/Q55172066)  
**Source**: https://4ort.xyz/entity/josef-d-ern-


## References

1. [Database of the Military Historical Archive](http://www.vuapraha.cz/soldier/18578015)
2. Czech National Authority Database
3. The Fine Art Archive
4. Virtual International Authority File
5. Bibliography of the History of the Czech Lands