Columbia subject headings:
Newman, John Henry, Saint, 1801-1890.
Theology.
Walgrave, Jan Hendrik, 1911-1986.
Harvard subject headings:
Newman, John Henry, Saint, 1801-1890
Theology.
Thomas, Aquinas, Saint, 1225?-1274
Walgrave, Jan Hendricus, 1911-
Princeton subject headings: