00442nam a2200181Ia 4500003000400000005001700004008004100021020001800062040000700080041000800087082001500095100002600110245003400136260004800170300000900218650001400227700001900241OSt20250805091907.0250729s2006    xx            000 0 und d  a9788171419135  cAL  aeng  a540.7 KUMM  aKumar, Kolasani Sunil  aMethods of teaching chemistry  aNew DelhibDiscovery Publishing Housec2006  a339p  aChemistry  aKrishna Sumith