# Ivan Vavřín

> Czech Geological Survey

**Wikidata**: [Q20114182](https://www.wikidata.org/wiki/Q20114182)  
**Source**: https://4ort.xyz/entity/ivan-vav-n


## References

1. Czech National Authority Database
2. Virtual International Authority File
3. [Source](http://rruff.info/doclib/cm/vol45/CM45_1213.pdf)