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_aForbes, T. J. _942282 |
| 245 | _aFactors affecting the productivity of permanent grassland; a national farm study | ||
| 260 |
_aHurley, England : _bGrassland Research Institute, _c1980 |
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| 300 | _a141 p. | ||
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_aPastos forrajeros _xRendimiento _2 _986118 |
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_aPastos _xEfecto del medio ambiente. _986022 |
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