Columbia subject headings:
Harvard subject headings:
Dante Alighieri, 1265-1321--Characters--Dolcino, Frà.
Dante Alighieri, 1265-1321--Characters--Manfred, king of Sicily.
Dante Alighieri, 1265-1321--Characters--Petrus Lombardus.
Princeton subject headings:
Dante Alighieri, 1265-1321--Criticism and interpretation.