# Johann G. Gustav Feldhahn
**Wikidata**: [Q60844739](https://www.wikidata.org/wiki/Q60844739)  
**Source**: https://4ort.xyz/entity/johann-g-gustav-feldhahn


## References

1. CERL Thesaurus
2. Catalog of the German National Library
3. MAK
4. [Source](http://thesaurus.cerl.org/record/cnp00369464)