Columbia subject headings:
Comedy films--History.
Comedy--History and criticism.
Ethics in literature.
Politics in literature.
Theater--History.
Violence in literature.
Wit and humor--History and criticism.
Harvard subject headings:
Comedy films--History.
Comedy--History and criticism
Ethics in literature.
Politics in literature.
Theater--History.
Violence in literature.
Wit and humor--History and criticism
Princeton subject headings: