@book{4157,
	author = {Pardey, Philip G. and Roseboom, Johannes. and Servicio Internacional para la Investigación Agrícola Nacional.},
	title = {National agricultural research from a regional and agroecological perspective},
	publisher = {International Service for National Agricultural Research,},
	year = {1991},
	series = {Working paper},
	address = {The Hague, Neetherlands :},
	note = {D52-241}
}