# M. J. Kingma
**Wikidata**: [Q21600619](https://www.wikidata.org/wiki/Q21600619)  
**Source**: https://4ort.xyz/entity/m-j-kingma


## References

1. Catalogus Professorum Academiae Groninganae
2. Virtual International Authority File
3. National Library of Israel Names and Subjects Authority File