Columbia subject headings:
Art and photography--History--20th century--Congresses.
Composition (Photography)
Photography, Artistic--Congresses.
Photography--Psychological aspects--Congresses.
Harvard subject headings:
Art and photography--History--20th century--Congresses.
Composition (Photography)
Photography, Artistic--Congresses
Photography--Psychological aspects--Congresses.
Princeton subject headings:
Art and photography--History--20th century--Congresses.
Composition (Photography)
Photography, Artistic--Congresses.
Photography--Psychological aspects--Congresses.