| 000 | 00402nam a2200133Ia 4500 | ||
|---|---|---|---|
| 008 | 200608s9999 xx 000 0 und d | ||
| 082 |
_a631.5'2 _bEVE.C |
||
| 100 | _aEvenson r e | ||
| 245 | 0 | _aCrop variety improvement and its effect on productivity: the impact of international agricultural research | |
| 260 |
_bCABI _c2003 |
||
| 300 | _axxv;522p | ||
| 650 | _aField crops breedings | ||
| 942 |
_cBK _2DDC |
||
| 999 |
_c4905 _d4905 |
||