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| 050 | _aS 540 .E25S34 | ||
| 245 | 4 | _aThe scientifil basis of modern agriculture. | |
| 260 |
_aAstralia _b sydney uni press _c1990 |
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| 650 | _aAgrculture-Economic Aspects | ||
| 942 | _cBK | ||
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_c550520 _d550520 |
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