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080 _a631.84.001.4
_bB496M
245 1 _aMethods for evaluating biological nitrogen fixation
_cedited by F.J.Bergersen
260 _aChichester [usw.]: Wiley
_c1980
650 0 0 _aBiological Nitrogen Fixation
700 1 _aBergersen, F. J.
100 _a
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