Columbia subject headings:
Oedipus (Tale)
Oedipus (Tale)--History and criticism.
Sphinxes (Mythology)--Folklore.
Harvard subject headings:
Oedipus (Tale)
Oedipus (Tale)--History and criticism.
Sphinxes (Mythology)--Folklore.
Princeton subject headings:
Oedipus (Greek mythological figure)
Sphinxes (Mythology)