@book{61495,
	author = {Barrera Serafín, Aristeo. and Koller González, Beder Jesús.},
	title = {Caracterización del mercado nacional e internacional de la guayaba (Psidium guajaba L.)},
	publisher = {El autor,},
	year = {1996},
	address = {Chapingo, Méx. :}
}