00518nam a2200133Ia 4500008004100000082002500041100008200066245005300148260003700201300001400238490005900252600005100311650002200362140224s9999    xx            000 0 und d  a661.5.001:63(063) M5  aInternational Symposium on Nitrogen Fixation, 6th, Corvallis, Aug.4-10, 1985.  aNitrogen fixation research progress proceedings/  aDordechtbMartinus Nijhoffc1985  axiv,731p.  aCurrent Plant Science and Biotechnology in Agriculture  aEdited by H.J.Evans, P.J.Bottomley W.E.Newton.  aNitrogen fixation