Columbia subject headings:
Architecture--Conservation and restoration--Handbooks, manuals, etc.
Architecture--Conservation and restoration--Ontario--Handbooks, manuals, etc.
Historic buildings--Conservation and restoration--Handbooks, manuals, etc.
Historic buildings--Conservation and restoration--Ontario--Handbooks, manuals, etc.
Harvard subject headings:
Architecture--Conservation and restoration
Architecture--Ontario--Conservation and restoration.
Historic buildings--Conservation and restoration
Historic buildings--Conservation and restoration--Ontario.
Princeton subject headings: