Columbia subject headings:
Dante Alighieri, 1265-1321. Purgatorio.
Landscapes in literature.
Nature in literature.
Harvard subject headings:
Dante Alighieri, 1265-1321--Criticism and interpretation.
Dante Alighieri, 1265-1321. Purgatorio.
Landscapes in literature.
Princeton subject headings:
Dante Alighieri, 1265-1321. Purgatorio.
Landscapes in literature.
Nature in literature.