@book{14521,
	author = {Brady, Nyle C. and Weil, Ray},
	title = {The Nature and Properties of Soils, },
	publisher = {Prentice Hall,},
	year = {2007.},
	address = {[S.l.] :},
	edition = {14th ed.},
	url = {http://www.amazon.com/exec/obidos/ASIN/013227938X/chopaconline}
}