@book{78535,
	author = {Byerlee, Derek. and López-Pereira, Miguel A.},
	title = {Technical change in maize production :},
	publisher = {Centro Internacional de Mejoramiento de Maíz y Trigo,},
	year = {1994.},
	series = {Economics. Working paper},
	address = {México, D.F. :}
}