# Otto de Greiff

> Colombian Esperantist (1903-1995)

**Wikidata**: [Q9053604](https://www.wikidata.org/wiki/Q9053604)  
**Source**: https://4ort.xyz/entity/otto-de-greiff


## References

1. BnF authorities
2. [Source](https://enciclopedia.banrepcultural.org/index.php/Otto_De_Greiff)
3. general catalog of BnF
4. Virtual International Authority File
5. [Source](https://viaf.org/viaf/data/viaf-20230206-links.txt.gz)
6. Faceted Application of Subject Terminology
7. Library of Congress Authorities