Columbia subject headings:
Photography, Artistic--Exhibitions.
Harvard subject headings:
Artists--Portraits--Exhibitions.
Landscape photography--Exhibitions.
Photography, Artistic--Exhibitions
Photography--History--20th century--Exhibitions.
Princeton subject headings:
Artists--Portraits--Exhibitions.
Landscape photography--Exhibitions.
Photography, Artistic--Exhibitions.
Photography--History--20th century--Exhibitions.
Portraits.