Columbia subject headings:
Harvard subject headings:
Architecture, Modern--20th century--Conservation and restoration--Great Britain--Congresses.
Architecture, Modern--20th century--Great Britain--Conservation and restoration.
Buildings--Protection--Great Britain--Congresses.
Buildings--Repair and reconstruction--Great Britain.
Princeton subject headings:
Architecture, Modern--20th century--Great Britain.
Architecture--Great Britain--Conservation and restoration.
Buildings--Protection--Great Britain.