# Ülo Heinsalu

> Estonian geologist and environmentalist (1928-1994)

**Wikidata**: [Q12379607](https://www.wikidata.org/wiki/Q12379607)  
**Source**: https://4ort.xyz/entity/-lo-heinsalu


## References

1. [Source](https://viaf.org/viaf/data/viaf-20230206-links.txt.gz)
2. Virtual International Authority File
3. Integrated Authority File
4. [LIBRIS. 2018](https://libris.kb.se/20dghm8l20wnnf3)