Columbia subject headings:
Adobe houses--Preservation.
Aztec Ruins National Monument (N.M.)
Chaco Culture National Historical Park (N.M.)
Historic buildings--Conservation and restoration.
Mesa Verde National Park (Colo.)
Harvard subject headings:
Building materials--Service life
Colorado--Antiquities
New Mexico--Antiquities
Polymer-impregnated mortar
Soils--Colorado--Testing.
Soils--New Mexico--Testing.
Princeton subject headings: