| 000 | 00323nam a2200121Ia 4500 | ||
|---|---|---|---|
| 008 | 180612s9999||||xx |||||||||||||| ||und|| | ||
| 041 | _aen | ||
| 082 | _a631.8 | ||
| 100 | _aA.Ayanala | ||
| 245 | 0 | _aBiological Nitrogen Fixation in Farming systems of the Tropics | |
| 260 |
_aChichester _bJohn wiley sons _c1977 |
||
| 942 | _cPR | ||
| 999 |
_c40069 _d40069 |
||