Columbia subject headings:
Art, Abstract--Germany--Ludwigshafen am Rhein--Exhibitions.
Arts, German--Germany--Ludwigshafen am Rhein--20th century--Exhibitions.
Harvard subject headings:
Art, Abstract--Exhibitions
Art, Modern--20th century--Exhibitions
Princeton subject headings:
Art, Abstract--Germany--Ludwigshafen am Rhein--Exhibitions.
Arts, Modern--20th century--Germany--Ludwigshafen am Rhein--Exhibitions.