Columbia subject headings:
Ibn Gabirol, active 11th century.
Philosophy, Medieval.
Thomas, Aquinas, Saint, 1225?-1274.
Harvard subject headings:
Aristotle--Congresses.
Ibn Gabirol, active 11th century--Congresses.
Plato--Congresses.
Thomas, Aquinas, Saint, 1225?-1274--Congresses.
Princeton subject headings:
Ibn Gabirol, active 11th century.
Philosophy, Medieval.
Thomas, Aquinas, Saint, 1225?-1274.