@book{170392,
	author = {Medina Plaza, Ramón and  Ramírez Valverde, Rodolfo, asesor},
	title = {La agricultura de conservación en el municipio de Salvatierra, Guanajuato, México  /},
	publisher = {El autor,},
	year = {2018},
	address = {México  :},
	url = {http://10.13.5.2/tesis/sist.115554pdf}
}