Columbia subject headings:
Petrarca, Francesco, 1304-1374--Appreciation--Poland.
Petrarca, Francesco, 1304-1374--Knowledge--Poland.
Harvard subject headings:
Petrarca, Francesco, 1304-1374--Appreciation--Poland.
Petrarca, Francesco, 1304-1374--Knowledge--Poland.
Princeton subject headings:
Petrarca, Francesco, 1304-1374--Knowledge--Poland.