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