Columbia subject headings:
Aristotle.
Frege, Gottlob, 1848-1925.
Thomas, Aquinas, Saint, 1225?-1274.
Harvard subject headings:
Aristotle
Frege, Gottlob, 1848-1925.
Thomas, Aquinas, Saint, 1225?-1274
Princeton subject headings:
Aristotle.
Frege, Gottlob, 1848-1925.
Thomas, Aquinas, Saint, 1225?-1274.