00497naa a2200181 a 450000100080000000500110000800800410001910000150006024500670007526000090014265000170015165000160016865000180018465000140020265300280021670000200024477300510026415980222009-11-09       1976    bl ---       0--  u    #d1 aWIEGEL, J.  aEnrichment and isolation of nitrogen fixing hydrogen bacteria.  c1976  aAzospirillum  aBioquímica  aMicrorganismo  aTaxonomia  aALGA NAO FIXADORA DE N21 aSCHLEGEL, H. G.  tArch. Microbiol.gv.107, n.2, p.139-142, 1976.