Columbia subject headings:
Vienna (Austria)--Economic conditions--Exhibitions.
Vienna (Austria)--History--1918-1938--Exhibitions.
Vienna (Austria)--Social life and customs--Exhibitions.
Harvard subject headings:
Socialism--Austria--Vienna--20th century--Exhibitions.
Socialism--Austria--Vienna--History--20th century--Exhibitions.
Vienna (Austria)--Social life and customs--Exhibitions.
Princeton subject headings:
Socialism--Austria--Vienna--History--20th century--Exhibitions.
Vienna (Austria)--Social life and customs--Exhibitions.