@book{94256,
	author = {Pulido S., Juan. and Aguilar Noh, Antonio Guadalupe.},
	title = {Química de suelos :},
	publisher = {UACH. Departamento de Suelos,},
	year = {[s. a.].},
	address = {Chapingo, Méx. :},
	edition = {2 ed.}
}