a person in the record
Leonardus Henricus Josephus Maria Janssen
Doctoral advisors on Wikidata: Frans T. M. Nieuwstadt and M. Donze.
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