00399nam a2200121Ia 4500008004100000082002600041100002500067245005800092260003600150300001400186600001900200650005800219140224s9999    xx            000 0 und d  a581.138.1(082.2) M4;1  aSubba Rao, N.S., ed.  aCurrent developments in Biological Nitrogen Fixation.  aNew DelhibOxford and IBHc1984  axiv,351p.  aN.S. Subba Rao  aBiological Nitrogen Fixation,Nitrogen Fixing Bacteria