Columbia subject headings:
Architecture--Arizona--Tombstone.
Architecture--Conservation and restoration.
Buildings--Arizona--Tombstone.
Harvard subject headings:
Architecture--Arizona--Tombstone--Conservation and restoration.
City planning--Arizona--Tombstone.
Historic sites--Conservation and restoration--Arizona--Tombstone.
Tombstone (Ariz.)--Buildings, structures, etc.--Conservation and restoration.
Princeton subject headings:
Architecture--Conservation and restoration.
City planning--Arizona--Tombstone.
Tombstone (Ariz.)--Historic houses, etc.