000 00334nam a2200121Ia 4500
008 220204s9999 xx 000 0 und d
082 _a631.461.5
_bRAO
245 0 _aRecent advances in biological nitrogen fixation.
260 _aNew Delhi
_bOxford & IBH
_c1979
650 _aNitrogen fixation
700 _aRAO, Subba N S
942 _cBK
999 _c36457
_d36457