a person in the record
Gerhard Billig
Doctoral advisors on Wikidata: Friedrich Behn, Friedrich Schlette, Gerhard Mildenberger, Hans Walther, and Joachim Herrmann.
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