# Johann Mahr

> German geologist and civil servant (1787-1869)

**Wikidata**: [Q1692957](https://www.wikidata.org/wiki/Q1692957)  
**Source**: https://4ort.xyz/entity/johann-mahr


## References

1. Integrated Authority File
2. [Source](https://bionomia.net/Q1692957)
3. [Source](https://d-nb.info/gnd/1042425531)
4. [Source](https://books.google.de/books?id=2bLPDAAAQBAJ&pg=PA532)