00514naa a2200181 a 450000100080000000500110000800800410001910000200006024500810008026000090016165000140017065000140018465000280019865300250022670000200025170000140027177300470028515989381995-06-27       1977    bl ---       0--  u    #d1 aBERINGER, J. E.  aThe isolation of conditional ineffective mutants of Rhizobium leguminosarum.  c1977  aGenética  aRhizobium  aRhizobium Leguminosarum  aLEGUMINOSA TEMPERADA1 aJOHNSTON, W. B.1 aWELLS, B.  tJ. Gen. Microbiol.gv.98, p.339-343, 1977.