Columbia subject headings:
Church history--Middle Ages, 600-1500.
Conciliar theory--History of doctrines.
Councils and synods--History.
Harvard subject headings:
Conciliar theory--History of doctrines--Middle Ages, 600-1500.
Princeton subject headings:
Church history--Middle Ages, 600-1500.
Conciliar theory--History of doctrines.
Councils and synods--History.