Columbia subject headings:
Metaphysics.
Thomas, Aquinas, Saint, 1225?-1274.
Harvard subject headings:
Metaphysics
Thomas, Aquinas, Saint, 1225?-1274
Thomas, Aquinas, Saint, 1225?-1274--Contributions in metaphysics.
Princeton subject headings:
Metaphysics.
Thomas, Aquinas, Saint, 1225?-1274.