Columbia subject headings:
Art, German--20th century--Exhibitions.
Avant-garde (Aesthetics)--Exhibitions.
Junger Westen (Group of artists)--Exhibitions.
Harvard subject headings:
Arts, German--20th century--Exhibitions.
Avant-garde (Aesthetics)--Germany--Recklinghausen (Münster)--Exhibitons.
Princeton subject headings: