Columbia subject headings:
Harvard subject headings:
Dante Alighieri, 1265-1321. Divina commedia.
Petrarca, Francesco, 1304-1374--Literary style.
Petrarca, Francesco, 1304-1374--Sources.
Petrarca, Francesco, 1304-1374. Rime
Princeton subject headings:
Petrarca, Francesco, 1304-1374--Style.
Petrarca, Francesco, 1304-1374. Rime.