TY  - BOOK
ED  - National Bureau of Economic Research (New York)and Social Science Research Council (US).Committee on Economic Growth
TI  - The Rate and direction of inventive activity: economic and social factors; a conference of the universities
U1  - 338.018 21st
PY  - 1962///
CY  - Princeton
PB  - Princeton Univesrsity Press
KW  - Inventions; Economic development
N1  - A report of the National Bureau of Economic Research, New York
ER  -