Columbia subject headings:
Harvard subject headings:
Cicero, Marcus Tullius--Criticism and interpretation.
Cicero, Marcus Tullius. Cato maior de senectute.
Cicero, Marcus Tullius. De officiis.
Ethics, Ancient.
Old age--Early works to 1800.
Princeton subject headings:
Cartagena, Alonso de, 1385?-1456.
Ethics, Ancient.