@book{63512,
	author = {Pérez Salazar, Salvador Mosqueira  and Sánchez Espinosa, Rogelio},
	title = {Introducción a la química y el ambiente },
	publisher = { : Grupo Patria Cultural},
	year = {, 2009},
	address = {México},
	note = {5a. reimpresión, 2009}
}