Columbia subject headings:
Dante Alighieri, 1265-1321--Criticism and interpretation.
Dante Alighieri, 1265-1321--Travel.
Dante Alighieri, 1265-1321. Purgatorio.
Harvard subject headings:
Dante Alighieri, 1265-1321--Commentaries.
Dante Alighieri, 1265-1321--Travel.
Dante Alighieri, 1265-1321. Purgatorio.
Princeton subject headings:
Dante Alighieri, 1265-1321. Purgatorio--Criticism, textual.
Dante Alighieri, 1265-1321. Purgatorio.