# Q135646602
**Wikidata**: [Q135646602](https://www.wikidata.org/wiki/Q135646602)  
**Source**: https://4ort.xyz/entity/q135646602


## References

1. Artists of the World
2. [Source](https://nl.numista.com/catalogue/artist.php?id=1111)
3. [Source](https://opac.kbr.be/Library/doc/SYRACUSE/11648733/les-timbres-a-effigie-de-leopold-iii-graves-par-maurice-poortman-1936-1941?_lg=nl-BE)