# Johann Placcius
**Wikidata**: [Q60831739](https://www.wikidata.org/wiki/Q60831739)  
**Source**: https://4ort.xyz/entity/johann-placcius


## References

1. Integrated Authority File
2. CERL Thesaurus
3. Catalog of the German National Library
4. Alvin
5. [Source](http://thesaurus.cerl.org/record/cnp00442323)