Columbia subject headings:
Harvard subject headings:
Catholic Church--Doctrines--History--Middle Ages, 600-1500--Sources.
Catholic Church--Infallibility--History of doctrines--Middle Ages, 600-1500--Sources.
Conciliar theory--History of doctrines--Middle Ages, 600-1500--Sources.
Councils and synods, Ecumenical--History--Sources.
Princeton subject headings:
Catholic Church--Doctrines--History of doctrines--Middle Ages, 600-1500--Sources.
Catholic Church--Infallibility--History of doctrines--Middle Ages, 600-1500--Sources.
Conciliar theory--History of doctrines--Middle Ages, 600-1500--Sources.
Councils and synods, Ecumenical--History--Sources.