Columbia subject headings:
Art, Modern--20th century--Catalogs.
Hahn, Wolfgang, 1924-1987--Art collections--Catalogs.
Museum Moderner Kunst (Austria)--Catalogs.
Harvard subject headings:
Art, Modern--20th century--Catalogs
Hahn, Wolfgang, 1924---Art collections--Catalogs.
Museum Moderner Kunst (Austria)--Catalogs.
Princeton subject headings: