@book{4138,
	author = {Esparza Martínez, Jesús Héctor.},
	title = {Variabilidad de las semillas},
	publisher = {INIFAP. Campo Agrícola Experimental La Laguna,},
	year = {1990},
	series = {Publicación especial},
	address = {Matamoros, Coah. :},
	note = {D52-222}
}