Columbia subject headings:
Aristotle. Metaphysics.
Aristotle. Nicomachean ethics.
Metaphysics.
Ontology.
Harvard subject headings:
Aristotle. Metaphysics
Aristotle. Nicomachean ethics.
Princeton subject headings:
Aristotle. Metaphysics.
Aristotle. Nicomachean ethics.
Metaphysics.
Ontology.