Columbia subject headings:
Harvard subject headings:
American drama--20th century--History and criticism
American drama--20th century--History and criticism--Theory, etc.
American drama--Russian influences.
Communism and literature--United States.
Communism--United States--1917-
Marxist criticism--United States.
Political plays, American--History and criticism--Theory, etc.
Political plays, American--History and criticism.
Politics and literature--United States.
Politics and literature.
Right and left (Political science) in literature.
Socialism and literature--United States.
Socialist realism in literature--United States.
Theater--Political aspects--United States--History--20th century.
Theater--Political aspects.
Theater--Soviet Union--History.
Theater--United States--History--20th century
Princeton subject headings:
American drama--20th century--History and criticism.
Communism--United States.
Marxist criticism--United States.
Political plays, American--History and criticism.
Politics and literature.
Socialist realism in literature--United States.
Theater--Political aspects.
Theater--Soviet Union--History--20th century.
Theater--United States--History--20th century.