@book{11406,
	author = {Klingebiel, A. A. and Montgomery, P. H. and E.U.A. Department of Agriculture.},
	title = {Clasificación de capacidad de uso de la tierra},
	publisher = {Dirección de Agrología,},
	year = {1977},
	series = {Manual de agricultura},
	address = {México :},
	edition = {2 ed.}
}