Columbia subject headings:
Harvard subject headings:
Fortification--Austria--Vienna--Dictionaries--German.
Street names--Austria--Vienna--Dictionaries--German.
Streets--Austria--Vienna--Dictionaries--German.
Vienna (Austria)--Buildings, structures, etc.--Dictionaries--German.
Princeton subject headings:
Castles--Austria--Vienna.
Streets--Austria--Vienna.
Towers--Austria--Vienna.
Vienna (Austria)--Gazetteers.
Vienna (Austria)--Guidebooks.