# Johann Erich Hahn
**Wikidata**: [Q107023722](https://www.wikidata.org/wiki/Q107023722)  
**Source**: https://4ort.xyz/entity/johann-erich-hahn


## References

1. BnF authorities
2. Integrated Authority File
3. [Source](http://mak.bn.org.pl/cgi-bin/KHW/makwww.exe?BM=1&NU=1&IM=4&WI=9810592624505606)
4. Virtual International Authority File
5. Czech National Authority Database
6. Provenio