# John Mark Glenn

> 1858-1950 , advocate for social reform

**Wikidata**: [Q63252754](https://www.wikidata.org/wiki/Q63252754)  
**Source**: https://4ort.xyz/entity/john-mark-glenn


## References

1. American National Biography Online
2. Find a Grave
3. Glenn, John Mark (1858-1950), advocate for social reform
4. MAK
5. Virtual International Authority File