Columbia subject headings:
Picasso, Pablo, 1881-1973--Exhibitions.
Vollard, Ambroise, 1867-1939--Art patronage--Exhibitions.
Harvard subject headings:
Picasso, Pablo, 1881-1973--Exhibitions.
Vollard, Ambroise, 1867-1939--Exhibitions.
Princeton subject headings:
Picasso, Pablo, 1881-1973--Exhibitions.
Vollard, Ambroise, 1867-1939--Exhibitions.