# Pierre Jules Callon

> French engineer and industrialist (1815–1875)

**Wikidata**: [Q11984975](https://www.wikidata.org/wiki/Q11984975)  
**Source**: https://4ort.xyz/entity/pierre-jules-callon


## References

1. Czech National Authority Database
2. BnF authorities
3. [Annales des mines. 1875](http://www.annales.org/archives/x/callonx.html)
4. [Court of Audit](https://www.ccomptes.fr/fr/biographies/callon-auguste-henri-eugene)
5. general catalog of BnF
6. Virtual International Authority File
7. [Source](https://viaf.org/viaf/data/viaf-20230206-links.txt.gz)
8. [Annales des mines](http://www.annales.org/archives/x/callon.html)
9. [Source](https://www.annales.org/archives/x/callon.html)