Columbia subject headings:
Harvard subject headings:
Petrarca, Francesco, 1304-1374. De otio religiosorum.
Petrarca, Gherardo, active 14th century.
Princeton subject headings:
Authors, Italian--To 1600--Biography.
Petrarca, Francesco, 1304-1374--Biography--Family.
Petrarca, Francesco, 1304-1374. De otio religiosorum.
Petrarca, Gherardo, active 14th century--Relations with family.