Keeping it clean :
removing exterior dirt, paint, stains, and graffiti from historic masonry buildings /
Anne E. Grimmer.
|Main Author:||Grimmer, Anne E.|
Washington, D.C. : U.S. Dept. of the Interior, National Park Service, Preservation Assistance Division, Technical Preservation Services : 1988.
Historic buildings > Historic buildings / Conservation and restoration.
34 p. :
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