| 000 | 00602nam#a2200217#c#4500 | ||
|---|---|---|---|
| 003 | IEF | ||
| 005 | 20180219162934.0 | ||
| 008 | 941205s1991 uuu####fr####| 0||u| |u | ||
| 040 | _aIEF | ||
| 100 | 1 |
_aGordon, Robert James _919205 |
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| 245 | _aProductivity in the transportation sector | ||
| 260 |
_aCambridge, Mss. _b NBER _c1991 |
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| 300 |
_av. _c 23 cm. |
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| 500 | _aResumen. -- Conclusiones. -- BibliografĂa. -- ApĂ©ndice | ||
| 490 | _aNBER. Working p. ; 3815 | ||
| 650 | 4 |
_aTRANSPORTES _948594 |
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| 650 | 4 |
_aASPECTOS ECONOMICOS _932202 |
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| 942 | _cLIB | ||
| 942 | _z32278 | ||
| 999 |
_c77210 _d77210 |
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