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＜図書＞
The rate and direction of inventive activity : economic and social factors; a conference of the Universities-National Bureau Committee for Economic Research and the Committee on Economic Growth of the Social Science Research Council

出版者	Princeton, N.J. : Princeton University Press
出版年	1962
大きさ	x, 635 p. diagrs. 24 cm.
著者標目	Universities--National Bureau Committee for Economic Research Social Science Research Council (U.S.). Committee on Economic Growth
件　名	Inventions
一般注記	""A report of the National Bureau of Economic Research, New York."" ＼ Bibliographical footnotes.

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