# J. M. Spier
**Wikidata**: [Q109856633](https://www.wikidata.org/wiki/Q109856633)  
**Source**: https://4ort.xyz/entity/j-m-spier


## References

1. [Source](https://nl.go.kr/authorities/resource/KAC2018M8716)
2. [Source](https://viaf.org/viaf/data/viaf-20230206-links.txt.gz)
3. Open Library
4. NUKAT