Columbia subject headings:
Oedipus (Greek mythological figure)
Harvard subject headings:
Drama--History and criticism
Oedipus (Greek mythological figure)--In literature.
Sophocles--Characters--Oedipus.
Sophocles. Oedipus Rex.
Sophocles. Oedipus at Colonus.
Princeton subject headings:
Oedipus (Greek mythological figure)