@book{10035,
	author = {Conference of "National Bureau of Economic Research", Lanox, Massachusetts, Fall, 1981 and Griliches, Zvi ; ed.},
	title = {Research and development patents and productivity; papers},
	publisher = {Chicago University Press},
	year = {1984},
	address = {Chicago},
	note = {(National Bureau of Economic Research Conference, report).}
}