Columbia subject headings:
Albigenses.
Occitan language--History.
Harvard subject headings:
Albigenses.
Languedoc (France)--History.
Princeton subject headings:
Albigenses.
Christian heresies--France--Languedoc--History--Middle Ages, 600-1500.
France--Church history--987-1515.
France--History--13th century.
Languedoc (France)--History.