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| 020 | _a0813805406 | ||
| 082 | _a338.1 ECO | ||
| 100 |
_aed. Heady, Earl O. _93369 |
||
| 245 | _aEconomic models and quantitative methods for decisions and planning in agriculture / ed. Earl O. Heady | ||
| 260 | _aIowa State Univ. Press | ||
| 650 |
_aAgricultural - economics aspects _93370 |
||
| 999 |
_c2271 _d2271 |
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