Columbia subject headings:
Böhler, Heinrich, 1881-1940--Exhibitions.
Photography, Artistic--Exhibitions.
Vienna (Austria)--Intellectual life--20th century--Exhibitions.
Harvard subject headings:
Böhler, Heinrich, 1881-1940--Exhibitions.
Photography, Artistic--Exhibitions
Vienna (Austria)--Intellectual life--20th century--Exhibitions.
Princeton subject headings: