# Leonard Jaczewski

> Polish-Russian explorer, geographer, geologist, cartographer, and mining engineer (1858–1916)

**Wikidata**: [Q4539854](https://www.wikidata.org/wiki/Q4539854)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Leonard_Jaczewski)  
**Source**: https://4ort.xyz/entity/leonard-jaczewski


## References

1. IdRef
2. Virtual International Authority File
3. [Source](https://viaf.org/viaf/data/viaf-20230206-links.txt.gz)
4. Sejm-Wielki.pl
5. Integrated Authority File