Columbia subject headings:
Harvard subject headings:
English drama--20th century--History and criticism
German drama--20th century--History and criticism.
Greek drama (Tragedy)--History and criticism.
Greek literature--Adaptations.
Philoctetes (Mythological character)--Drama.
Sophocles--Adaptations.
Sophocles. Philoctetes
Sophocles. Philoctetes--Adaptations.
Princeton subject headings:
Drama.
English drama--20th century--History and criticism.
German drama--20th century--History and criticism.
Philoctetes (Mythological character)--Drama.
Sophocles. Philoctetes--Adaptations.
Sophocles. Philoctetes.