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| 008 | 241205s1987 ec ||||| |||| 00| 0 spa d | ||
| 040 | _cIIGG | ||
| 100 | 1 | _aSerrano, Vladimir | |
| 245 | _aEconomía y ecología | ||
| 260 |
_aQuito : _bCEDECO, _c1987? |
||
| 300 | _a196 p. | ||
| 650 | _aECONOMÍA | ||
| 650 | _aECOLOGÍA | ||
| 650 | _aAGRICULTURA | ||
| 650 | _aECUADOR | ||
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