Columbia subject headings:
Apollinaire, Guillaume, 1880-1918--Friends and associates--Exhibitions.
Delaunay, Robert, 1885-1941--Friends and associates--Exhibitions.
Ernst, Max, 1891-1976--Friends and associates--Exhibitions.
Macke, August, 1887-1914--Friends and associates--Exhibitions.
Harvard subject headings:
Apollinaire, Guillaume, 1880-1918--Friends and associates--Exhibitions.
Delaunay, Robert, 1885-1941--Friends and associates--Exhibitions.
Ernst, Max, 1891-1976--Friends and associates--Exhibitions.
Macke, August, 1887-1914--Friends and associates--Exhibitions.
Princeton subject headings:
Apollinaire, Guillaume, 1880-1918--Exhibitions.
Delaunay, Robert, 1885-1941--Exhibitions.
Ernst, Max, 1891-1976--Exhibitions.
Macke, August, 1887-1914--Friends and associates--Exhibitions.