| 000 | 00357nam a2200133Ia 4500 | ||
|---|---|---|---|
| 008 | 130225s9999 xx 000 0 und d | ||
| 100 | _aHeady, Earl O., Jensen, Harald R. | ||
| 245 | _aEconomics of crop rotations and land use | ||
| 260 |
_aLowa _c1951 |
||
| 300 | _a420-459 p. | ||
| 440 | _aIowa Agricultural Experiment | ||
| 901 | _a32462 | ||
| 942 |
_cB _2udc |
||
| 999 |
_c6255 _d6255 |
||