Columbia subject headings:
Authors, Latin--Correspondence--Indexes.
Cicero, Marcus Tullius--Dictionaries--Indexes.
Cicero, Marcus Tullius. Ad Atticum.
Dependency--Indexes.
Slavery--Rome--Indexes.
Statesmen--Rome--Correspondence--Indexes.
Harvard subject headings:
Cicero, Marcus Tullius. Ad Atticum--Indexes.
Cicero, Marcus Tullius. Correspondence--Indexes.
Dependency--Indexes.
Slavery--Rome--Indexes.
Princeton subject headings:
Cicero, Marcus Tullius--Knowledge--Slavery.
Cicero, Marcus Tullius. Ad Atticum.