| 000 | 00462nam a2200157Ia 4500 | ||
|---|---|---|---|
| 008 | 130223s9999 xx 000 0 und d | ||
| 080 | _a633.15:631.(68) | ||
| 245 | _aSoil fertility management research for the maize cropping systems of smallholder | ||
| 260 | _aMexico | ||
| 260 | _bInternational Maize and Wheat Improvement Center | ||
| 260 | _c1996 | ||
| 300 | _a36p. | ||
| 440 | _aNo.96-02; CIMMYT Natural resou | ||
| 901 | _pS44143 | ||
| 942 |
_cB _2udc |
||
| 999 |
_c133643 _d133643 |
||