| 000 | 00702nam a2200241Ia 4500 | ||
|---|---|---|---|
| 003 | OSt | ||
| 005 | 20220926042550.0 | ||
| 006 | a|||||r|||| 00| 0 | ||
| 007 | ta | ||
| 008 | 220923b |||||||| |||| 00| 0 eng d | ||
| 037 | _cGeneral Book | ||
| 040 |
_aRTL _cRTL _beng |
||
| 041 |
_2eng _aeng |
||
| 082 | _aD6,78obX, K2 | ||
| 110 |
_aNational Bureau Of Economic Research. _9317506 |
||
| 245 | 0 |
_aRate and direction of inventive activity _b economi |
|
| 260 | _c1962 | ||
| 490 | _aIts special conference series, B. | ||
| 650 |
_aEngineering _92968 |
||
| 700 |
_aNational Bureau Of Economic Research. _9317507 |
||
| 942 |
_hD6,78obX, K2 _cGB _2CC |
||
| 999 |
_c670036 _d670036 |
||