00430naa a2200169 a 450000100080000000500110000800800410001910000180006024500590007826000090013765000160014665000180016270000190018070000180019970000180021777300250023516193231995-06-27       1943    bl ---       0--  u    #d1 aBURRIS, R. H.  aDetection of nitrogen fixation with isotopic nitrogen.  c1943  aBioquímica  aMicrorganismo1 aEPPLING, F. J.1 aWAHLIN, H. B.1 aWILSON, P. W.  gv., p.349-357, 1943.