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_a338.9 _bA58 |
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_aAmerican Society of Agronomy. Madison, Wis. _95293 |
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| 245 | _aAgronomy in a changing world and research needs for the seventies | ||
| 260 |
_aMadison : _bThe Society, _c1971 |
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| 300 | _a65 p. | ||
| 490 |
_aASA special publication _v; 19 |
||
| 500 | _a36-65 | ||
| 590 |
_aBATCH-UPD _b10 _c20130110 _lUCH01 _h1902 |
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| 650 | 1 | 4 |
_aAgricultura _xInvestigación. _91577 |
| 650 | 1 | 4 |
_aPolítica agrícola. _990283 |
| 650 | 1 | 4 |
_aPolítica alimentaria. _990389 |
| 830 | 0 |
_aASA special publication _v; 19 |
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