Columbia subject headings:
Painting, Abstract--United States--Exhibitions.
Smith, Leon Polk, 1906-1996--Exhibitions.
Harvard subject headings:
Painting, American--20th century--Exhibitions
Smith, Leon Polk, 1906-1996--Exhibitions.
Princeton subject headings:
Painting, Abstract--United States--Exhibitions.
Smith, Leon Polk, 1906-1996--Exhibitions.