Columbia subject headings:
Harvard subject headings:
Gardens--Denmark--Gr°asten--Pictorial works.
Gråsten (Denmark)--Description and travel.
Gråsten (Denmark)--Pictorial works.
Gråsten slot (Gråsten, Denmark)--Pictorial works.
Princeton subject headings:
Gardens--Denmark--Sønderjyllands amt.
Gråsten slot (Sønderjyllands amt, Denmark)
Sønderjyllands amt (Denmark)--Description and travel.