00305nam a2200121Ia 45000030006000000080041000060400015000471000031000622450052000932600009001455460012001540050017001660STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aBurns, R.C.; Hardy, R.W.F.  aNitrogen fixation in bacteria and higher plants  c1975  aEnglish20220125170325.0