@book{20334,
	author = {Ardito-Barletta, Nicolas.},
	title = {Costs and social benefits of agricultural research in México},
	publisher = {The author,},
	year = {1971},
	address = {Chicago, Ill., :},
	note = {Thesis (Ph. D.) -- University of Chicago. Faculty of the Division of the Social Science. Department of economics}
}