Columbia subject headings:
Utrillo, Maurice, 1883-1955--Exhibitions.
Valadon, Suzanne, 1865-1938--Exhibitions.
Harvard subject headings:
Utrillo, Maurice, 1883-1955--Exhibitions.
Valadon, Suzanne, 1865-1938--Exhibitions.
Princeton subject headings:
Utrillo, Maurice, 1883-1955--Exhibitions.
Valadon, Suzanne, 1865-1938--Exhibitions.