# P. I. Stepanov

> Coal geologist

**Wikidata**: [Q12157743](https://www.wikidata.org/wiki/Q12157743)  
**Source**: https://4ort.xyz/entity/p-i-stepanov


## References

1. Great Soviet Encyclopedia (1969–1978)
2. IdRef
3. Czech National Authority Database
4. Q137732450
5. Great Russian Encyclopedia
6. Virtual International Authority File
7. Q137170397
8. [Source](https://www.ras.ru/nappelbaum/a8a4c40c-08d3-439d-8103-83928edfa3cf.aspx?hidetoc=0)
9. The Paleontological Society of Russia and the Regime in the 1916–1920s
10. [Source](https://www.ras.ru/nappelbaum/144ae5bc-4434-4b69-863c-b9cc02476270.aspx?hidetoc=0)