000 00333nam a2200121Ia 4500
008 140113s9999 xx 000 0 und d
082 _a581.13 L4
100 _a"Burns, R.C. & Hardy, R.W.F."
245 _aNitrogen fixation in bacteria and higher plants
260 _a1975
_bSpringer-Verlag
_cNew York
300 _a189
942 _cBK
999 _c59762
_d59762