@book{50181,
	author = {Pierre, William Henry. and Conferencia Interamericana de Agricultura},
	title = {Adjusting soil management to the emergency in the United States},
	publisher = {Comité Permanente de la Segunda Conferencia Interamericana de Agricultura,},
	year = {1944},
	series = {Publicaciones. Sección 2A},
	address = {México :}
}