Columbia subject headings:
Christian heresies--History--Middle Ages, 600-1500.
Europe--Church history--600-1500.
Inquisition.
Harvard subject headings:
Albigenses.
Christian heresies--History--Middle Ages, 600-1500
Europe--History--476-1492.
Inquisition--History--Sources.
Inquisition.
Waldenses.
Princeton subject headings:
Christian heresies--History--Middle Ages, 600-1500.
Europe--Church history--600-1500.
Inquisition.