# Pieter Bierens de Haan

> Dutch psychiatrist (1869–1941)

**Wikidata**: [Q137802597](https://www.wikidata.org/wiki/Q137802597)  
**Source**: https://4ort.xyz/entity/pieter-bierens-de-haan


## References

1. [Source](https://www.openarchieven.nl/hua:A5716DE4-A62C-2A43-E053-4701000A21CE)
2. [Source](https://www.openarchieven.nl/hua:02FF16DA-C87C-4AF5-B757-63BC6DA9AACD)
3. [Utrecht Archives](https://www.openarchieven.nl/hua:02FF16DA-C87C-4AF5-B757-63BC6DA9AACD)
4. [Utrecht Archives](https://www.openarchieven.nl/hua:A5716DE4-A62C-2A43-E053-4701000A21CE)