# Robert E. Butts
**Wikidata**: [Q55939589](https://www.wikidata.org/wiki/Q55939589)  
**Source**: https://4ort.xyz/entity/robert-e-butts


## References

1. BnF authorities
2. Catalog of the German National Library
3. Catalogue of the Library of the Pontifical University of Saint Thomas Aquinas
4. MAK
5. datos.bne.es
6. CONOR.SI
7. Faceted Application of Subject Terminology
8. Virtual International Authority File
9. National Library of Israel Names and Subjects Authority File