Columbia subject headings:
American drama--History and criticism.
English drama--History and criticism.
Theater--Great Britain.
Theater--United States.
Harvard subject headings:
American drama--History and criticism
English drama--History and criticism
Theater--English-speaking countries.
Theater--Great Britain.
Theater--United States.
Princeton subject headings:
American drama--History and criticism.
English drama--History and criticism.
Theater--Great Britain.
Theater--United States.