TY  - BOOK
AU  - NATIONAL BUREAU OF ECONOMIC RESEARCH
ED  - NATIONAL BUREAU OF ECONOMIC RESEARCH
TI  - 52nd annual report,1972 :  Innovation in economic research.   
U1  - X:(B286).N76<N72r, L2 
PY  - 1972///
CY  - New York
PB  - National Bureau of Economic Research     
ER  -