TY  - BOOK
ED  - Universities--National Bureau Committee for Economic Research.
ED  - Social Science Research Council (U.S.).
TI  - 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
U1  - 330 
PY  - 1962///
CY  - Princeton
PB  - Princeton University Press
KW  - Inventions
N1  - "A report of the National Bureau of Economic Research, New York."; Bibliographical footnotes
ER  -