@book{50295,
	author = {Universities--National Bureau Committee for Economic Research. and Social Science Research Council U.S.},
	title = {The rate and direction of inventive activity, economic and social factors},
	publisher = {Arno Press},
	year = {1962.},
	series = {National Bureau of Economic Research publications in reprint},
	address = {New York},
	note = {Reprint of the ed. published by Princeton University Press, Princeton, as v. 13 of the Special Conference series of the National Bureau of Economic Research.}
}