# Gertrud J. M. van Loon
**Wikidata**: [Q106259135](https://www.wikidata.org/wiki/Q106259135)  
**Source**: https://4ort.xyz/entity/gertrud-j-m-van-loon


## References

1. IdRef
2. Catalog of the German National Library
3. Virtual International Authority File
4. [Source](http://mak.bn.org.pl/cgi-bin/KHW/makwww.exe?BM=1&NU=1&IM=4&WI=9811461623205606)