00371naa a2200133 a 450000100080000000500110000800800410001910000170006024500550007726000090013265000160014170000170015777300630017416202091995-06-27       1958    bl ---       0--  u    #d1 aALLEN, E. K.  aBiological aspects of symbiotic nitrogen fixation.  c1958  aNitrogênio1 aALLEN, O. N.  tIn: Encyclopedia of Plant Physiology.gv., p.48-113, 1958.