Columbia subject headings:
Dix, Otto, 1891-1969--Catalogs.
Zeppelin-Museum--Catalogs.
Harvard subject headings:
Dix, Otto, 1891-1969--Catalogs.
Zeppelin-Museum--Catalogs.
Princeton subject headings:
Dix, Otto, 1891-1969--Catalogs.
Zeppelin-Museum--Catalogs.