@book{24574,
	author = {Usherwood, Noble R,},
	title = {Transferring Technology for Small - Scale Farming /},
	publisher = {Soil Science of America, America Society of Agronomy,},
	year = {1985.},
	series = {SSSA Special Publication Number 41},
	address = {Madison, Wisconsin :},
	note = {Resultado del Simposio Internacional de la Sociedad de la Ciencia del Suelo en America y División de la Sociedad Americana de Agronomía en Chicago, Illinois 3 - 8 Dic de 1978.}
}