Columbia subject headings:
Dix, Otto, 1891-1969--Exhibitions.
Harvard subject headings:
Dix, Otto, 1891-1969. Hugo Erfurth with dog--Exhibitions.
Princeton subject headings:
Art, German--20th century--Exhibitions.
Dix, Otto, 1891-1969--Exhibitions.
Dix, Otto, 1891-1969. Hugo Erfurth with dog--Exhibitions.