000 00289nam a2200097Ia 4500
008 120224s9999 xx 000 0 und d
082 _a581.133
_bRAO
100 _aRao, N.S. Subba
245 _aBiological nitrogen fixation ; recent development
260 _bOxford & IBH
_aNew Delhi
_c1988
999 _c133181
_d133181