# Johannes Herman Frederik Umbgrove

> Dutch geologist (1899-1954)

**Wikidata**: [Q377061](https://www.wikidata.org/wiki/Q377061)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Johannes_Herman_Frederik_Umbgrove)  
**Source**: https://4ort.xyz/entity/johannes-herman-frederik-umbgrove


## References

1. dataset Library TU Delft
2. Integrated Authority File
3. RKDartists
4. International Standard Name Identifier
5. Virtual International Authority File
6. Johannes Herman Frederik Umbgrove. Biografisch Portaal
7. KNAW Past Members
8. Freebase Data Dumps. 2013
9. Biografisch Portaal
10. IdRef
11. National Library of Israel Names and Subjects Authority File