@book{6871,
	author = {López López, Porfirio.},
	title = {Guía para cultivar cebolla en los Valles Centrales de Oaxaca},
	publisher = {INIFAP. Campo Experimental Valles Centrales,},
	year = {1991},
	series = {INIFAP. Folleto para productores},
	address = {Oaxaca, Oax. :}
}