Columbia subject headings:
Architecture--Austria--Vienna--History--20th century--Guidebooks.
Architecture--Austria--Vienna--History--21st century--Guidebooks.
Vienna (Austria)--Buildings, structures, etc.--Guidebooks.
Vienna (Austria)--Guidebooks.
Harvard subject headings:
Architecture--Austria--Vienna--20th century.
Architecture--Austria--Vienna--21st century.
Vienna (Austria)--Buildings, structures, etc.--Guidebooks.
Vienna (Austria)--Guidebooks.
Princeton subject headings: