| 000 | cam a22 a 4500 | ||
|---|---|---|---|
| 999 |
_c25104 _d25104 |
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| 003 | BD-DhIDS | ||
| 005 | 20180317004454.0 | ||
| 008 | 180317t1962 -us||||| |||| 00| 0 eng d | ||
| 040 |
_aBD-DhIDS _cBD-DhIDS _dBD-DhIDS |
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| 041 | _aEng | ||
| 082 |
_a330.1 _bNBER |
||
| 110 | 2 |
_a _aNational Bureau of Economic Research |
|
| 245 | 0 | 4 |
_aThe Rate and direction of inventive activity : _beconomic and social factors . |
| 260 |
_b _aPrinceton : _bUniversity Press , _c1962 |
||
| 300 |
_a _ax, 635p. ; _c23 cm. |
||
| 504 | _aIncludes bibliographical references and index. | ||
| 650 | 0 | 4 | _aEconomic theory |
| 942 |
_2ddc _cBK |
||