00393nam a2200145Ia 4500008004100000020001500041082001600056100002100072245004300093260004000136300000800176650002300184650001800207653002200225170901s1987    xx            000 0 und d  a0824777514  a589.7bE48S  aElkan, Gerald H. 0aSymbiotic Nitrogen Fixation Technology  aNew YorkbMarcel Dekker, Inc.c1987  a440  aBotanical sciences  aPure Sciences  aNitrogen fixation