| 000 | 00387nam a2200121Ia 4500 | ||
|---|---|---|---|
| 001 | MPKV056901 | ||
| 008 | 120911s9999 xx 000 0 und d | ||
| 082 | _a630 | ||
| 245 |
_aProcceding of the national Academy of science Vol.71 No.4-6 _c; |
||
| 246 | _aProcceding of the national Academy of science Vol.71 No.4-6 | ||
| 260 |
_aUSA _bNational Academy of science _c1974 |
||
| 650 | _aAgronomy | ||
| 999 |
_c54895 _d54895 |
||