@book{4507,
	author = {Ballesteros Patrón, Gustavo.},
	title = {Evolución del frijol lima (Phaseolus lunatus L.)},
	publisher = {Colegio de Postgraduados,},
	year = {1990},
	address = {Montecillo, Méx. :},
	note = {53-356}
}