@book{78428,
	author = {Soule, Meredith J.},
	title = {Farmer assessment of velvetbean as a green manure in Veracruz, Mexico :},
	publisher = {Centro Internacional de Mejoramiento de Maíz y Trigo,},
	year = {1997.},
	series = {Documento},
	address = {México, D.F. :}
}