00288nam a22001097a 4500003000400000008004100004082001700045100002200062245005100084260003500135300000800170OSt230827b        |||||||| |||| 00| 0 eng d  a589.95bS92R  aRao, N. S. Subba.  aRecent Advance in Biological Nitrogen Fixation  aI.B.H. PatnabOxford IBHc1979  a486