000 00277nam a2200121Ia 4500
008 161121s9999 xx 000 0 und d
100 _aDIXON (ROD) ; WHEELER. C. T
245 0 _aNitrogen fixation in plants
260 _cBlackie
365 _b0
650 _aNIL
942 _cBK
999 _c94645
_d94645