| 000 | 00669nam#a2200217#c#4500 | ||
|---|---|---|---|
| 003 | IEF | ||
| 005 | 20180219162225.0 | ||
| 008 | 941031s1962 uuu####fr####| 0||u| |u | ||
| 040 | _aIEF | ||
| 110 | 2 |
_aNational Bureau of Economic Research _933614 |
|
| 245 | _aThe Rate and Direction of Inventive Activity : Economic and Social Factors :a conference | ||
| 260 |
_aPrinceton _b Princeton University Press _c1962 |
||
| 300 |
_aX, 635 p. _c 24 cm. |
||
| 490 | _aSpecial Conference Series ; v. 13 | ||
| 650 | 4 |
_aDESARROLLO TECNOLOGICO _942572 |
|
| 650 | 4 |
_aASPECTOS ECONOMICOS _932202 |
|
| 650 | 4 |
_aTECNOLOGIA _948535 |
|
| 942 | _cLIB | ||
| 942 | _z8883 | ||
| 999 |
_c71322 _d71322 |
||