Columbia subject headings:
Celibacy.
Christian heresies--History--Early church, ca. 30-600.
Harvard subject headings:
Celibacy--History.
Christian heresies--History--Middle Ages, 600-1500
Church history--Middle Ages, 600-1500
Princeton subject headings:
Celibacy.
Christian heresies--History--Early church, ca. 30-600.