Columbia subject headings:
Sophocles--Characters--Heroines.
Sophocles--Characters--Heros.
Sophocles--Technique.
Harvard subject headings:
Greek drama (Tragedy)--History and criticism.
Sophocles--Criticism and interpretation.
Princeton subject headings:
Sophocles--Characters--Heroines.
Sophocles--Characters--Heros.
Sophocles--Technique.