Columbia subject headings:
Obey, André, 1892-1975--Technique.
Theater--History--20th century.
Wilder, Thornton, 1897-1975--Technique.
Harvard subject headings:
Obey, André, 1892-1975--Technique.
Theater--History--20th century.
Wilder, Thornton, 1897-1975--Technique.
Princeton subject headings: