| 000 | 00525 a2200169 4500 | ||
|---|---|---|---|
| 005 | 20170317172137.0 | ||
| 008 | 170317b xxu||||| |||| 00| 0 eng d | ||
| 040 | _cIITK | ||
| 041 | _aeng | ||
| 082 |
_a330.5 _bN20sp |
||
| 111 | _aa conference of the universities-national bureau committee for economic research | ||
| 245 | 1 |
_aThe rate and direction of inventive activity _beconomic and social factor |
|
| 260 |
_c1962 _aNew York _bPrinceton University Press |
||
| 300 | _a635 | ||
| 650 | _aEconomic factor | ||
| 942 | _cBK | ||
| 999 |
_c454424 _d454424 |
||