00250nam a22000977a 4500003000400000008004100004082001700045100001600062245002600078260004800104OSt230608b        |||||||| |||| 00| 0 eng d  a631.42bA45P  aSingh, Amar  aPrayogic Mrida Vigyan  aPantnagarbU. P. Hindi Grandh Academyc1972