Columbia subject headings:
Harvard subject headings:
Historic gardens--Conservation and restoration.
Historic gardens--Great Britain--Conservation and restoration.
Historic parks--Great Britain--Conservation and restoration.
Historic sites--Great Britain--Conservation and restoration.
Landscape protection--Great Britain.
Landscape protection.
Nature conservation--Great Britain
Parks--Great Britain--Conservation and restoration.
Princeton subject headings:
Gardens--Great Britain.
Landscape architecture--Great Britain.
Parks--Great Britain.