Columbia subject headings:
Dante Alighieri, 1265-1321. Inferno. Canto 15-19.
Harvard subject headings:
Dante Alighieri, 1265-1321--Criticism and interpretation.
Dante Alighieri, 1265-1321. Inferno. Canto 15-19.
Princeton subject headings:
Dante Alighieri, 1265-1321. Inferno. Canto 15-19.