00606naa a2200241 a 450000100080000000500110000800800410001910000130006024500840007326000090015765000130016665000140017965000160019365300150020965300150022465300110023965300100025065300120026065300130027265300160028565300150030177300480031617982151999-07-29       1978    bl ---       0--  u    #d1 aHILL, S.  aFactor influencing the efficiency of nitrogen fixation in free-living bacteria.  c1978  anitrogen  aBactéria  aNitrogênio  aEfficiency  aEficiencia  aFactor  aFator  aFixacao  aFixation  aFree-living  aVida livre  tEcological Bulletingv.26, p.130-136, 1978.