# Heinrich Riikoja

> Estonian zoologist and hydrobiologist (1891-1988)

**Wikidata**: [Q16406766](https://www.wikidata.org/wiki/Q16406766)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Heinrich_Riikoja)  
**Source**: https://4ort.xyz/entity/heinrich-riikoja


## References

1. Catalog of the German National Library
2. Virtual International Authority File