# Harco Sonius
**Wikidata**: [Q107551572](https://www.wikidata.org/wiki/Q107551572)  
**Source**: https://4ort.xyz/entity/harco-sonius


## References

1. Virtual International Authority File
2. [Source](https://viaf.org/viaf/data/viaf-20230206-links.txt.gz)
3. CiNii Research
4. [Nationaal Archief](https://www.nationaalarchief.nl/onderzoeken/archief/2.21.205.59)
5. [Source](http://beeldbankwo2.nl/nl/beelden/detail/da367638-025a-11e7-904b-d89d6717b464/media/10cee6bc-cd4b-2766-65e4-c34b22bf4b60)
6. [Source](https://hdl.handle.net/21.12123/4251)