| 000 | 00637nam#a2200217#c#4500 | ||
|---|---|---|---|
| 003 | IEF | ||
| 005 | 20180219172513.0 | ||
| 008 | 950804s1989 uuu####fr####| 0||u| |u | ||
| 040 | _aIEF | ||
| 100 | 1 |
_aLichtenberg, Frank R. _925917 |
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| 245 | _aThe impact of R and D investment on productivity : New Evidence Using Linked R and D LRD Data | ||
| 260 |
_aCambridge (Mass.) _b NBER _c1989 |
||
| 300 |
_a44 p. _c24 cm |
||
| 500 | _aResumen. -- Bibliografía | ||
| 490 | _aNBER. W.P.;2901 | ||
| 650 | 4 |
_aINVESTIGACION CIENTIFICA _945101 |
|
| 650 | 4 |
_aDESARROLLO TECNOLOGICO _942572 |
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| 942 | _cLIB | ||
| 942 | _z77225 | ||
| 999 |
_c122524 _d122524 |
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