Columbia subject headings:
Art, European--20th century--Exhibitions.
Art, European--Exhibitions.
Lenz, Gerhard--Art collections--Exhibitions.
Sammlung Lenz Schönberg--Exhibitions.
Harvard subject headings:
Art, European--Exhibitions
Art, Modern--20th century--Europe--Exhibitions.
Lenz, Gerhard--Art collections--Exhibitions.
Princeton subject headings: