Columbia subject headings:
Harvard subject headings:
Gardens--Conservation and restoration--Bibliography.
Gardens--Conservation and restoration--Germany--Bibliography.
Gardens--Germany--Conservation and restoration--Bibliography.
Historic gardens--Conservation and restoration--Germany--Bibliography.
Historic gardens--Germany--Conservation and restoration--Bibliography.
Princeton subject headings:
Gardens--Conservation and restoration--Bibliography.
Gardens--Germany--Conservation and restoration--Bibliography.
Historic gardens--Germany--Conservation and restoration--Bibliography.