00465naa a2200169 a 450000100080000000500110000800800410001910000180006024500920007826000090017065000160017965000120019565300080020770000180021570000180023377300440025116065391995-06-27       1953    bl ---       0--  u    #d1 aNEWTON, J. W.  aDirect demonstration of ammonia as an intermediate in nitrogen fixation by Azotobacter.  c1953  aAzotobacter  aMétodo  a15N1 aWILSON, P. W.1 aBURRIS, R. H.  tJ. Biol. Chem.gv.204, p.445-451, 1953.