Columbia subject headings:
Dix, Otto, 1891-1969--Criticism and interpretation.
Galerie der Stadt Stuttgart--Catalogs.
Harvard subject headings:
Dix, Otto, 1891-1969--Catalogs
Dix, Otto, 1891-1969--Criticism and interpretation.
Galerie der Stadt Stuttgart--Catalogs.
Princeton subject headings:
Catalogs.
Dix, Otto, 1891-1969--Catalogs.
Dix, Otto, 1891-1969--Criticism and interpretation.