Columbia subject headings:
Harvard subject headings:
Authors, Italian--To 1500--Correspondence
Authors, Latin (Medieval and modern)--Correspondence.
Petrarca, Francesco, 1304-1374--Views on papacy.
Princeton subject headings:
Authors, Italian--To 1500--Correspondence.
Italy--Politics and government--1268-1559.
Papacy--History--1309-1378.
Petrarca, Francesco, 1304-1374. Correspondence.