Columbia subject headings:
Cinematography--Congresses.
Motion pictures--History--Congresses.
Photography, Artistic--Congresses.
Harvard subject headings:
Cinematography--Congresses.
Motion pictures--History--Congresses
Photography, Artistic--Congresses
Princeton subject headings:
Cinematography--Congresses.
Motion pictures--History--Congresses.
Photography, Artistic--Congresses.