Identifiers
| WikiData URI | http://www.wikidata.org/entity/Q2037740 |
| Biografisch Portaal | http://www.biografischportaal.nl/persoon/07115911 |
| Amsterdam Museum | http://hdl.handle.net/11259/people.75291 |
| VIAF | http://viaf.org/viaf/42643525 |
| Adamlink URI | https://adamlink.nl/person/heldring-ottho-gerhard/8232 |
