# Ulbo de Sitter

> Dutch geologist (1902–1980)

**Wikidata**: [Q2179964](https://www.wikidata.org/wiki/Q2179964)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Ulbo_de_Sitter)  
**Source**: https://4ort.xyz/entity/ulbo-de-sitter


## References

1. Leidse Hoogleraren
2. Integrated Authority File
3. Virtual International Authority File
4. KNAW Past Members
5. BnF authorities
6. National Library of Israel Names and Subjects Authority File
7. Catalogo of the National Library of India