00250nam a22000977a 4500003000400000008004100004082002100045100001400066245004000080260003200120OSt230609b        |||||||| |||| 00| 0 eng d  a636.089264bR19B  aRao, G.S.  aBhrun Vigyan ki Prayogsala  Pustika  aPantnagarbG.P. Univ.c1972