00503naa a2200157 a 450000100080000000500110000800800410001910000200006024501250008026000090020565000160021465000180023065300280024870000160027677300530029216008131995-06-27       1978    bl ---       0--  u    #d1 aPETERSON, R. B.  aHigh recovery of nitrogenase activity and of Fe-55-labeled nitrogenase in heterocysts isolated from Anabaena variabilis.  c1978  aBioquímica  aMicrorganismo  aALGA NAO FIXADORA DE N21 aWOLK, C. P.  tProc. Natl. Acad. Sci.gv.75, p.6271-6275, 1978.