Columbia subject headings:
Architecture--Austria--Vienna--History--20th century.
Architecture--Austria--Vienna.
Vienna (Austria)--Buildings, structures, etc.
Harvard subject headings:
Architects--Austria--Vienna.
Architecture, Modern--20th century--Austria--Vienna.
Architecture, Modern--20th century--Designs and plans
Architecture--Austria--Vienna
Architecture--Austria--Vienna--Designs and plans.
Vienna (Austria)--Buildings, structures, etc.
Princeton subject headings:
Architects--Austria--Vienna.
Architecture, Modern--20th century--Austria--Vienna.
Architecture--Austria--Vienna.
Vienna (Austria)--Buildings, structures, etc.