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_aDix, Ralph _eed. _933045 |
| 245 | 1 | 4 | _aThe grassland ecosustem; a preliminary synthesis |
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_aFor Collins, Colorado State. : _bUniv. Range Science Dept., _c1969 |
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| 300 |
_a437 p. _b: ilus. ; gráfs. |
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_aScience series _v; 2 |
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_aPastizales _xEcología. _985933 |
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_aPastizales _xModelos matemáticos. _985949 |
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_aBeidleman, Richard G. _eed. _911307 |
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_aScience series _v; 2 _9103323 |
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