| 000 | 00380nam a2200145Ia 4500 | ||
|---|---|---|---|
| 008 | 170101s1967 xx 000 0 und d | ||
| 082 | _a631.558 S99M | ||
| 245 | 0 | _aMaximum crop yields--the challenge (papers) | |
| 260 |
_bMadison, U. S. _c1967 |
||
| 300 | _a92p | ||
| 440 | _aASA special publication, no. 9 | ||
| 650 | _aCROP YIELDS | ||
| 653 | _aCROP YIELDS | ||
| 942 |
_2ddc _cB |
||
| 999 |
_c68251 _d68251 |
||