Identifiers
| WikiData URI | http://www.wikidata.org/entity/Q2244591 |
| Biografisch Portaal | http://www.biografischportaal.nl/persoon/69783989 |
| RKDartists | https://rkd.nl/explore/artists/45311 |
| Amsterdam Museum | http://hdl.handle.net/11259/people.23375 |
| Rijksmuseum Amsterdam | urn:rijksmuseum:people:RM0001.PEOPLE.75189 |
| VIAF | http://viaf.org/viaf/95878021 |
| Adamlink URI | https://adamlink.nl/person/koekkoek-willem/4396 |
