00285nam a2200109Ia 4500008004100000082001500041100002100056245003700077250000900114260004400123300000800167240913s9999||||xx |||||||||||||| ||und||  a530  GOS/A  aSamir Kumar Gosh 2aA Text Book of Practical physics  aNULL  bNew Central Book AgencyaCalcuttac2008  a389