Columbia subject headings:
Exchange--Greece--History--To 1500.
Friendship in literature.
Friendship--Greece--History--To 1500.
Greece--Civilization--To 146 B.C.
Interpersonal relations--Greece--History--To 1500.
Values--Greece--History--To 1500.
Harvard subject headings:
Exchange--Greece--History--To 1500.
Friendship in literature
Friendship--Greece--History--To 1500.
Greece--Civilization--To 146 B.C.
Interpersonal relations--Greece--History--To 1500.
Values--Greece--History--To 1500.
Princeton subject headings:
Exchange--Greece.
Friendship in literature.
Friendship--Greece.
Greece--Civilization--To 146 B.C.
Interpersonal relations--Greece.
Values--Greece.