Columbia subject headings:
Harvard subject headings:
Human embryo--Moral and ethical aspects.
Soul--History of doctrines--Middle Ages, 600-1500.
Thomas, Aquinas, Saint, 1225?-1274
Princeton subject headings:
Human embryo--Moral and ethical aspects.
Soul--History of doctrines--Middle Ages, 600-1500.
Thomas, Aquinas, Saint, 1225?-1274.