000			00517nam a2200181Ia 4500
008			130910s9999 xx 000 0 und d
020			_a0471277592
041			_aeng
082			_221st ed. _a572.545 _bMET
245			_aMethods for evaluating biological nitrogen fixation _cedited by F.J. Bergersen
260			_aChichester : _bJohn Wiley and Sons , _c1980
300			_ax, 680 p.
300			_efigures
504			_aIndex: p. 681-702.
653			_aNitrogen fixation
700			_aBergersen, F. J., ed.
942			_cEN _2ddc
999			_c9672 _d9672