Columbia subject headings:
Parks--Austria--Vienna--Design and construction.
Parks--Austria--Vienna.
Harvard subject headings:
Hager Landschaftsarchitektur AG.
Landscape architecture--Austria--Vienna.
Parks--Austria--Vienna--Designs and plans.
Parks--Austria--Vienna.
Rudolf-Bednar-Park (Vienna, Austria)
Princeton subject headings:
Parks--Austria--Vienna--Design and construction.
Parks--Austria--Vienna.