# Category:Discoveries by Joseph Helffrich

> Wikimedia category

**Wikidata**: [Q21971274](https://www.wikidata.org/wiki/Q21971274)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Category:Discoveries_by_Joseph_Helffrich)  
**Source**: https://4ort.xyz/entity/category-discoveries-by-joseph-helffrich