Columbia subject headings:
Blum, Kurt--Exhibitions.
Matter, Herbert, 1907-1984--Exhibitions.
Rothko, Mark, 1903-1970--Exhibitions.
Rothko, Mark, 1903-1970--Portraits--Exhibitions.
Harvard subject headings:
Blum, Kurt--Exhibitions.
Matter, Herbert, 1907-1984--Exhibitions.
Rothko, Mark, 1903-1970--Exhibitions.
Rothko, Mark, 1903-1970--Portraits--Exhibitions.
Princeton subject headings: