@book{7522,
	author = {Day, Ken W.},
	title = {Concrete mix design, quality control and specification /},
	publisher = {CRC Press,},
	year = {2006.},
	address = {[S.l.] :},
	edition = {3rd ed.},
	url = {http://www.amazon.com/exec/obidos/ASIN/0415393132/chopaconline-20}
}