Columbia subject headings:
Athens (Greece)--Civilization.
Philosophy and civilization.
Sophists (Greek philosophy)
Harvard subject headings:
Greece--Economic conditions--To 146 B.C.
Greece--Intellectual life--To 146 B.C.
Greece--Social life and customs.
Sophists (Greek philosophy)
Princeton subject headings:
Greece--Economic conditions--To 146 B.C.
Greece--Intellectual life--To 146 B.C.
Greece--Social life and customs.
Sophists (Greek philosophy)