Columbia subject headings:
Drawing, German--Catalogs.
Drawing--20th century--Catalogs.
Ernst, Max, 1891-1976--Catalogs.
Rubbing--Germany--Catalogs.
Harvard subject headings:
Drawing, German--Catalogs
Drawing--20th century--Catalogs.
Ernst, Max, 1891-1976--Catalogs.
Rubbing--Germany--Catalogs.
Princeton subject headings: