a person in the record
Gerrit-Jan Akkerman
Doctoral advisors on Wikidata: Cees Witteveen, John-Jules Ch Meyer, and Sophius Christiaan van Westrhenen.
Advisors on Wikidata
Wikidata's own statements of who supervised whom, kept apart from the record's theses and never counted with them.
Wikidata run graph-wikidata-20261008T172418Z