@book{80321,
	author = {Sain, Gustavo E.},
	title = {Maize production and agricultural policies in Central América and México},
	publisher = {Centro Internacional de Mejoramiento de Maíz y Trigo,},
	year = {1999.},
	series = {Economía. Documento de trabajo},
	address = {México, D.F. :}
}