@book{613640,
	author = {Clifton, James R. and ASTM Committee E-6 on Performance of Building Constructions.},
	title = {Cleaning stone and masonry :},
	publisher = {ASTM,},
	year = {c1986.},
	address = {Philadelphia, PA :},
	note = {"ASTM publication code number (PCN) 04-935000-10."}
}