Columbia subject headings:
American drama (Comedy)--History and criticism.
Comedians--United States.
Theater--United States--19th century.
Harvard subject headings:
American drama (Comedy)--History and criticism.
Comedians--United States
Theater--United States--History--19th century.
Theater--United States.
Princeton subject headings:
American drama (Comedy)--History and criticism.
Comedians--United States.
Theater--United States.