Columbia subject headings:
Arno River Valley (Italy)--In literature.
Dante Alighieri, 1265-1321. Divina commedia.
Florence (Italy)--In literature.
Harvard subject headings:
Arno River Valley (Italy)--in literature.
Dante Alighieri, 1265-1321. Divina commedia.
Florence (Italy)--In literature.
Princeton subject headings:
Dante Alighieri, 1265-1321--Criticism and interpretation.