Columbia subject headings:
Monuments--Conservation and restoration--Mediterranean Region--Congresses.
Stone buildings--Conservation and restoration--Mediterranean Region--Congresses.
Stone--Deterioration--Congresses.
Stone--Preservation--Congresses.
Harvard subject headings:
Princeton subject headings:
Monuments--Mediterranean Region--Conservation and restoration--Congresses.
Stone buildings--Mediterranean Region--Conservation and restoration--Congresses.
Stone--Deterioration--Congresses.
Stone--Preservation--Congresses.