@book{33585,
	author = {Medcalf, J. C. and Bontempo A.},
	title = {El uso de herbicidas pregerminativos para el control de las malas hierbas en cafetales nuevos},
	publisher = {IBEC Research Institute,},
	year = {1961},
	series = {IBEC},
	address = {New York :}
}