Columbia subject headings:
Architecture--Austria--Exhibitions.
Architecture--Austria--History--20th century--Exhibitions.
Harvard subject headings:
Architecture, Modern--20th century--Austria--Exhibitions.
Architecture, Modern--20th century--Exhibitions
Architecture, Modern--Austria--20th century--Exhibitions.
Architecture--Austria--Exhibitions.
Princeton subject headings:
Architecture, Modern--20th century--Austria.
Architecture--Austria.