@book{48273,
	author = {Richardson, R. W., Jr. and ENA. Colegio de Postgraduados. Chapingo, Méx.},
	title = {A plant for the development of coordinated institution of agricultural education, research and extension at Chapingo, Méx.},
	publisher = {(s.e.),},
	year = {(s.a.)},
	address = {(s.l.) :}
}