Columbia subject headings:
Historic buildings--Austria--Vienna.
Monuments--Austria--Vienna.
Vienna (Austria)--History, Local.
Harvard subject headings:
Architecture--Austria--Vienna--Guidebooks.
Historic buildings--Austria--Vienna--Guidebooks.
Historic buildings--Austria--Vienna.
Monuments--Austria--Vienna.
Vienna (Austria)--Guidebooks.
Vienna (Austria)--History, Local.
Princeton subject headings:
Architecture--Austria--Vienna.
Vienna (Austria)--Guidebooks.