Columbia subject headings:
Petrarca, Francesco, 1304-1374--Literary style.
Petrarca, Francesco, 1304-1374--Versification.
Harvard subject headings:
Petrarca, Francesco, 1304-1374--Literary style.
Petrarca, Francesco, 1304-1374--Versification.
Princeton subject headings:
Petrarca, Francesco, 1304-1374--Style.
Petrarca, Francesco, 1304-1374--Versification.