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| 008 | 971013s1978 r 00010 d | ||
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_aOelhaf, Robert C. _982767 |
| 245 | _aOrganic agriculture ; economic and ecological comparisons with conventional methods | ||
| 260 |
_aNew York : _bAllanheld, _c1978 |
||
| 300 | _a271 p. | ||
| 590 |
_aBATCH-UPD _b10 _c20130110 _lUCH01 _h1421 |
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| 590 |
_aBATCH-UPD _b10 _c20130410 _lUCH01 _h0903 |
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_aAbonos. _9235 |
| 650 | 1 | 4 |
_aControl biológico de plagas. _927587 |
| 650 | 1 | 4 |
_aMedio ambiente _xContaminación. _974069 |
| 650 | 1 | 4 |
_aSistemas de cultivo. _9106746 |
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