Columbia subject headings:
Gardens--Design--Exhibitions.
Gardens--Germany--Hannover--Exhibitions.
Landscape architecture--Designs and plans--Exhibitions.
Landscape architecture--Germany--Hannover--Exhibitions.
Harvard subject headings:
Gardens--Germany--Hannover.
Hannover (Germany)--Buildings, structures, etc.
Landscape architecture--Germany--Hannover.
Parks--Germany--Hannover.
Urban landscape architecture--Germany.
Princeton subject headings: