Columbia subject headings:
Harvard subject headings:
Duncan, David Douglas--Exhibitions.
Photography, Artistic--Exhibitions
Picasso, Pablo, 1881-1973--Friends and associates--Pictorial works--Exhibitions.
Picasso, Pablo, 1881-1973--Portraits--Exhibitions.
Princeton subject headings:
Duncan, David Douglas--Exhibitions.
Picasso, Pablo, 1881-1973--Portraits--Exhibitions.
Portrait photography--France--Exhibitions.