Columbia subject headings:
Gabo, Naum, 1890-1977--Exhibitions.
Winter, Fritz, 1905-1976--Exhibitions.
Harvard subject headings:
Gabo, Naum, 1890-1977--Exhibitions.
Winter, Fritz, 1905-1976--Exhibitions.
Princeton subject headings:
Gabo, Naum, 1890-1977--Exhibitions.
Winter, Fritz, 1905---Exhibitions.