Columbia subject headings:
American drama--20th century--History and criticism.
English drama--20th century--History and criticism.
Theater--England--London.
Theater--New York (State)--New York.
Harvard subject headings:
Princeton subject headings:
American drama--20th century--History and criticism.
English drama--20th century--History and criticism.
Theater--England--London.
Theater--New York (State)--New York.