# Helmut Sick

> ornithologist (1910–1991)

**Wikidata**: [Q69846](https://www.wikidata.org/wiki/Q69846)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Helmut_Sick)  
**Source**: https://4ort.xyz/entity/helmut-sick


## References

1. Integrated Authority File
2. Czech National Authority Database
3. International Standard Name Identifier
4. Virtual International Authority File
5. CiNii Research
6. Freebase Data Dumps. 2013
7. Catalogo of the National Library of India