00415nam a2200169Ia 4500008004100000082001600041100001900057245002200076260003300098300000800131650002300139650001800162653002200180700001600202942001200218999001500230170901s1980    xx            000 0 und d  a589.7bS80N  aStewart, W.D.P 0aNitrogen Fixation  aLondonbAcademic Pressc1980  a451  aBotanical sciences  aPure Sciences  aNitrogen fixation  aGallon, J.R  2ddccBK  c9892d9892