# Category:Discoveries by Joel Hastings Metcalf

> Wikimedia category

**Wikidata**: [Q25195370](https://www.wikidata.org/wiki/Q25195370)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Category:Discoveries_by_Joel_Hastings_Metcalf)  
**Source**: https://4ort.xyz/entity/category-discoveries-by-joel-hastings-metcalf