Columbia subject headings:
Motion picture plays--History and criticism.
Motion pictures--History.
Motion pictures.
Silent films--History and criticism.
Harvard subject headings:
Motion picture plays--History and criticism.
Motion pictures
Silent films--History and criticism
Silent films--History.
Sound motion pictures--History.
Princeton subject headings:
Motion picture plays--History.
Motion pictures.
Silent films--History and criticism.
Sound motion pictures--History.