Columbia subject headings:
Baumeister, Willi, 1889-1955--Catalogs.
Painting, Abstract--Germany--Catalogs.
Harvard subject headings:
Baumeister, Willi, 1889-1955--Catalogs.
Baumeister, Willi, 1899-1955.
Painting, Abstract--Germany--Catalogs.
Princeton subject headings:
Baumeister, Willi, 1889-1955.