# Johann Geilfus

> (1592-1654)

**Wikidata**: [Q21546753](https://www.wikidata.org/wiki/Q21546753)  
**Source**: https://4ort.xyz/entity/johann-geilfus


## References

1. Integrated Authority File
2. Mathematics Genealogy Project
3. Catalog of the German National Library
4. CiNii Research
5. Virtual International Authority File
6. Early Modern Letters Online
7. LIBRIS
8. VcBA (identifier)
9. MAK