Columbia subject headings:
Koch, John, 1909-1978--Exhibitions.
Harvard subject headings:
Koch, John, 1909-1978
Koch, John, 1909-1978--Exhibitions.
Painting, American--New York (State)--New York--Exhibitions.
Painting, American--New York--Exhibitions.
Princeton subject headings:
Koch, John, 1909-1978--Exhibitions.
Painting, American--New York--Exhibitions.