Columbia subject headings:
Criticism--Ireland--History--20th century.
O'Neill, Eugene, 1888-1953--Appreciation--Ireland.
O'Neill, Eugene, 1888-1953--Stage history--Ireland.
Theater--Ireland--History--20th century.
Harvard subject headings:
Criticism--Ireland--History--20th century.
O'Neill, Eugene, 1888-1953--Appreciation--Ireland.
O'Neill, Eugene, 1888-1953--Stage history--Ireland.
Theater--Ireland--History--20th century.
Princeton subject headings:
Criticism--Ireland--History--20th century.
O'Neill, Eugene, 1888-1953--Appreciation--Ireland.
O'Neill, Eugene, 1888-1953--Stage history--Ireland.
Theater--Ireland--History--20th century.