00313nam a2200121Ia 450000500170000000800410001704100080005808200150006610000180008124500430009926000400014230000090018220260720174819.0260720s2014    xx            000 0 und d  aeng  a530.7 KANM  aKanwaljit aur  aModern approach to Teaching of Science  aLudhiyanabTandon Publicationc2014  a358p