@book{94913,
	author = {Sagarnaga Villegas, Leticia Myriam.},
	title = {Panorama económico de granjas porcinas representativas del Estado de Guanajuato, 2002 - 2009},
	publisher = {Universidad Autónoma Chapingo,},
	year = {2006},
	address = {Chapingo, Méx. :}
}