00252nam a22000977a 4500003000400000008004100004100001100045245005500056260003600111300000700147OSt230930b        |||||||| |||| 00| 0 eng d  aF.A.O.  aNon Protein Nitrogen in the Nutrition of Ruminants  aoxford, New DelhibF.A.O.c1976  a94