Columbia subject headings:
Petrarca, Francesco, 1304-1374--Criticism and interpretation.
Petrarca, Francesco, 1304-1374--Philosophy.
Harvard subject headings:
Petrarca, Francesco, 1304-1374--Criticism and interpretation.
Petrarca, Francesco, 1304-1374--Philosophy.
Princeton subject headings:
Petrarca, Francesco, 1304-1374--Criticism and interpretation.
Petrarca, Francesco, 1304-1374--Philosophy.