Columbia subject headings:
Dante Alighieri, 1265-1321.
Petrarca, Francesco, 1304-1374.
Harvard subject headings:
Dante Alighieri, 1265-1321
Petrarca, Francesco, 1304-1374
Princeton subject headings:
Dante Alighieri, 1265-1321.
Petrarca, Francesco, 1304-1374.