# Karl Groos

> German psychologist and philosopher (1861-1946)

**Wikidata**: [Q77521](https://www.wikidata.org/wiki/Q77521)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Karl_Groos)  
**Source**: https://4ort.xyz/entity/karl-groos


## References

1. Integrated Authority File
2. Mathematics Genealogy Project
3. Czech National Authority Database
4. International Standard Name Identifier
5. Virtual International Authority File
6. CiNii Research
7. Freebase Data Dumps. 2013