Columbia subject headings:
Gardens--Germany--Saarbrücken--Exhibitions.
Landscape architecture--Germany--Saarbrücken--Exhibitions.
Parks--Germany--Saarbrücken--Exhibitions.
Saarbrücken (Germany)--Buildings, structures, etc.--Exhibitions.
Harvard subject headings:
Gardens--Germany--Saarbrücken--Exhibitions.
Historic gardens--Germany--Saarbrücken--Exhibitions.
Landscape architecture--Germany--Saarbrücken--Exhibitions.
Princeton subject headings: