Columbia subject headings:
History--Religious aspects--Christianity--History of doctrines--Middle Ages, 600-1500.
Middle Ages--Historiography.
Harvard subject headings:
History--Religious aspects--Christianity--History of doctrines--Middle Ages, 600-1500
Middle Ages--Historiography
Princeton subject headings:
History--Religious aspects--Christianity--History of doctrines--Middle Ages, 600-1500.
Middle Ages--Historiography.