Columbia subject headings:
Dramatic criticism--Philosophy.
O'Neill, Eugene, 1888-1953. Moon for the misbegotten.
Tillich, Paul, 1886-1965--Criticism and interpretation.
Harvard subject headings:
Dramatic criticism--Philosophy.
O'Neill, Eugene, 1888-1953. Moon for the misbegotten.
Tillich, Paul, 1886-1965--Metaphysics.
Princeton subject headings: