# Jeffrey P. Callen
**Wikidata**: [Q103397851](https://www.wikidata.org/wiki/Q103397851)  
**Source**: https://4ort.xyz/entity/jeffrey-p-callen


## References

1. Virtual International Authority File
2. Library of Congress Authorities
3. [Source](https://opac.al.cobiss.net/opac7/conor/7882086)