Columbia subject headings:
Art, Abstract--United States--Exhibitions.
Martin, Agnes, 1912-2004--Exhibitions.
Tuttle, Richard, 1941---Exhibitions.
Harvard subject headings:
Martin, Agnes, 1912-2004--Exhibitions.
Tuttle, Richard, 1941---Exhibitions.
Princeton subject headings:
Martin, Agnes, 1912-2004--Exhibitions.
Tuttle, Richard, 1941---Exhibitions.