Columbia subject headings:
Aristotle.
Essentialism (Philosophy)--Philosophy.
Ontology--History.
Plato.
Substance (Philosophy)--History.
Harvard subject headings:
Aristotle
Essentialism (Philosophy)--History.
Ontology--History.
Plato
Substance (Philosophy)--History.
Princeton subject headings:
Aristotle.
Ontology--History.
Plato.