Columbia subject headings:
Portrait photography--Exhibitions.
Portraits, Group--Exhibitions.
Social groups--Pictorial works--Exhibitions.
Harvard subject headings:
Portrait photography--Exhibitions
Portraits, Group--Exhibitions.
Social groups--Pictorial works--Exhibitions.
Princeton subject headings:
Photography, Artistic--Exhibitions.
Portrait photography--Exhibitions.
Portraits, Group--Exhibitions.
Social groups--Pictorial works--Exhibitions.