Columbia subject headings:
Thomas, Aquinas, Saint, 1225?-1274--Concordances.
Harvard subject headings:
Thomas, Aquinas, Saint, 1225?-1274
Princeton subject headings:
Index Thomisticus.
Thomas, Aquinas, Saint, 1225?-1274--Concordances.
Thomas, Aquinas, Saint, 1225?-1274--Dictionaries, indexes, etc.