Identifiers
| WikiData URI | http://www.wikidata.org/entity/Q32957 |
| Biografisch Portaal | http://www.biografischportaal.nl/persoon/68280212 |
| Ecartico | http://www.vondel.humanities.uva.nl/ecartico/persons/8713 |
| RKDartists | https://rkd.nl/explore/artists/28478 |
| Amsterdam Museum | http://hdl.handle.net/11259/people.28183 |
| Rijksmuseum Amsterdam | urn:rijksmuseum:people:RM0001.PEOPLE.11882 |
| VIAF | http://viaf.org/viaf/36999435 |
| Adamlink URI | https://adamlink.nl/person/folkema-jacob/2976 |
