Identifiers
| WikiData URI | http://www.wikidata.org/entity/Q2272831 |
| RKDartists | https://rkd.nl/explore/artists/8162 |
| Amsterdam Museum | http://hdl.handle.net/11259/people.60433 |
| Adamlink URI | https://adamlink.nl/person/bier-john/3623 |
| WikiData URI | http://www.wikidata.org/entity/Q2272831 |
| RKDartists | https://rkd.nl/explore/artists/8162 |
| Amsterdam Museum | http://hdl.handle.net/11259/people.60433 |
| Adamlink URI | https://adamlink.nl/person/bier-john/3623 |