# Donald E. Hartley
**Wikidata**: [Q93238602](https://www.wikidata.org/wiki/Q93238602)  
**Source**: https://4ort.xyz/entity/donald-e-hartley


## References

1. BnF authorities
2. Integrated Authority File
3. Virtual International Authority File
4. Catalogue of the Library of the Pontifical University of the Holy Cross