# Johannes Boelstra

> Dutch police officer (1886-1951)

**Wikidata**: [Q4356670](https://www.wikidata.org/wiki/Q4356670)  
**Source**: https://4ort.xyz/entity/johannes-boelstra


## References

1. [Source](https://resolver.kb.nl/resolve?urn=MMKB08:000167657:mpeg21:pdf)
2. [Source](https://resolver.kb.nl/resolve?urn=ddd:011132578:mpeg21:a0082)
3. [Beeldbank WO2](http://beeldbankwo2.nl/nl/beelden/detail/5c694370-025a-11e7-904b-d89d6717b464/media/11313ba8-347c-5a00-6c4a-4cff08188127)
4. [Source](https://www.nationaalarchief.nl/onderzoeken/archief/2.13.04/invnr/762/file/NL-HaNA_2.13.04_762_0107?eadID=2.13.04&unitID=762&query=)
5. [Source](https://resolver.kb.nl/resolve?urn=MMKB08:000166963:mpeg21:p002)