# Ralph W. Sleeper
**Wikidata**: [Q85830034](https://www.wikidata.org/wiki/Q85830034)  
**Source**: https://4ort.xyz/entity/ralph-w-sleeper


## References

1. CiNii Research
2. [Source](http://catalogo.pusc.it/auth/74438)
3. VIAF ID
4. Catalogue of the Library of the Pontifical University of Saint Thomas Aquinas
5. NUKAT