Columbia subject headings:
Metzger, Helmuth--Art collections--Exhibitions.
Painting, German--Germany (West)--Exhibitions.
Painting, Modern--20th century--Exhibitions.
Harvard subject headings:
Metzger, Helmuth--Art collections--Exhibitions.
Painting, German--Germany (West)--Exhibitions.
Painting, Modern--20th century--Germany (West)--Exhibitions.
Princeton subject headings: