Columbia subject headings:
Oedipus (Greek mythological figure)--In literature--Congresses.
Sophocles. Oedipus Rex.
Sophocles. Oedipus at Colonus.
Harvard subject headings:
Oedipus (Greek mythological figure)--In literature--Congresses.
Sophocles. Oedipus Rex--Congresses.
Sophocles. Oedipus at Colonus--Congresses.
Princeton subject headings: