00346naa a2200145 a 450000100080000000500110000800800410001910000200006024500430008026000060012365300120012970000150014170000230015677300210017916044202019-07-01               bl ---       0--  u    #d1 aBERINGER, J. E.  aSymbiotic Nitrogen fixation in plants.  c0  aREVISAO1 aBREWIN, N.1 aJOHNSTON, A. W. B.  gv., p.43-50, 19.