| 000 | 00541nam#a2200205#c#4500 | ||
|---|---|---|---|
| 003 | IEF | ||
| 005 | 20180219171139.0 | ||
| 008 | 941205s1989 uuu####fr####| 0||u| |u | ||
| 040 | _aIEF | ||
| 100 | 1 |
_aHelpman, Elhanan _920970 |
|
| 245 | _aQuality ladders and product cycles | ||
| 260 |
_aCambridge [Mss.] _b NBER _c1989 |
||
| 300 |
_a29 p. _b gráf. _c23 cm. |
||
| 500 | _aResumen. -- Bibliografía | ||
| 490 | _aNBER. Working Paper;3201 | ||
| 650 | 4 |
_aMODELOS MATEMATICOS _947777 |
|
| 942 | _cLIB | ||
| 942 | _z32456 | ||
| 999 |
_c111582 _d111582 |
||