| 000 | 00395nam a2200145Ia 4500 | ||
|---|---|---|---|
| 008 | 130223s9999 xx 000 0 und d | ||
| 100 | _aPesek, J.T. | ||
| 245 | _aProduction surfaces and economic optima for corn yields with respect to stand an | ||
| 260 | _aAmes | ||
| 260 | _c1959 | ||
| 300 | _a595-616 p. | ||
| 440 | _aIowa Agricultural Experiment S | ||
| 901 | _pS921 | ||
| 942 |
_cB _2udc |
||
| 999 |
_c130751 _d130751 |
||