# Johann Tretzel
**Wikidata**: [Q55900480](https://www.wikidata.org/wiki/Q55900480)  
**Source**: https://4ort.xyz/entity/johann-tretzel


## References

1. CERL Thesaurus
2. Catalog of the German National Library
3. BnF authorities
4. [Source](http://thesaurus.cerl.org/record/cnp01086635)