# Ricardo Ulloa Barrenechea
**Wikidata**: [Q55999436](https://www.wikidata.org/wiki/Q55999436)  
**Source**: https://4ort.xyz/entity/ricardo-ulloa-barrenechea


## References

1. Catalog of the German National Library
2. datos.bne.es
3. The LiederNet Archive
4. Faceted Application of Subject Terminology