@book{84232,
	author = {Quintero Lizaola, Roberto and Colegio de Postgraduados. Chapingo, Méx.},
	title = {La edafología y sus perspectivas al siglo XXI},
	publisher = {Colegio de Postgraduados,},
	year = {2000.},
	address = {México, D.F. :}
}