Columbia subject headings:
Drei, Lia--Exhibitions.
Guerrieri, Francesco, 1931-2015--Exhibitions.
Harvard subject headings:
Color in art--Exhibitions
Drei, Lia--Exhibitions.
Guerrieri, Francesco, 1931-2015--Exhibitions.
Painting, Abstract--Italy--Exhibitions.
Princeton subject headings:
Drei, Lia--Exhibitions.
Guerrieri, Francesco, 1931-2015--Exhibitions.