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| 100 | 0 | 0 | _aGraaff, Jan de. |
| 245 | 0 |
_aSoil conservation and sustainable land use _b: an economic approach |
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| 260 |
_aAmsterdam, Royal Tropical Institute, _c1993 |
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| 300 |
_a191 p. _b: ilus., gráfs. |
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| 490 | 0 | _aDevelopment oriented research in agriculture | |
| 500 | _aNo esta mutilado, está mal encuadernado | ||
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_aCONVERSION _b10 _c20130109 _lUCH01 _h1306 |
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| 650 | 1 | 4 |
_aSuelos _xConservación. _9110283 |
| 650 | 1 | 4 |
_aTierras _xUtilización. _9113219 |
| 830 | 0 |
_aDevelopment oriented research in agriculture _932260 |
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