# Petrus Ryff

> Swiss scientist

**Wikidata**: [Q7179222](https://www.wikidata.org/wiki/Q7179222)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Petrus_Ryff)  
**Source**: https://4ort.xyz/entity/petrus-ryff


## References

1. Catalog of the German National Library
2. Virtual International Authority File
3. IdRef
4. Historical Dictionary of Switzerland
5. Mathematics Genealogy Project
6. International Standard Name Identifier
7. LIBRIS. 2013