# Johann Vetzer
**Wikidata**: [Q55910552](https://www.wikidata.org/wiki/Q55910552)  
**Source**: https://4ort.xyz/entity/johann-vetzer


## References

1. Integrated Authority File
2. CERL Thesaurus
3. Catalog of the German National Library
4. [Source](http://thesaurus.cerl.org/record/cnp01131554)