Columbia subject headings:
Harvard subject headings:
Aging--Philosophy.
Cicero, Marcus Tullius--Criticism and interpretation.
Cicero, Marcus Tullius. Cato maior de senectute.
Schopenhauer, Arthur, 1788-1860. Vom Unterschiede der Lebensalter.
Wisdom--Philosophy.
Princeton subject headings:
Aging--Philosophy.
Cicero, Marcus Tullius--Criticism and interpretation.
Cicero, Marcus Tullius. Cato maior de senectute.
Schopenhauer, Arthur, 1788-1860. Vom Unterschiede der Lebensalter.
Wisdom--Philosophy.