@book{82389,
	author = {Porta Casanellas, Jaime. and López-Acevedo Reguerín, Marta.},
	title = {Edafología},
	publisher = {Mundi-Prensa,},
	year = {1999.},
	address = {México, D.F. :},
	edition = {2 ed. rev. y aum.}
}