00293nam a2200121Ia 450000500170000000800410001704100080005808200150006610000170008124500260009826000380012430000090016220260720174553.0260720s2004    xx            000 0 und d  aeng  a540.7 MITT  aMittal, Arun  aTeaching of chemistry  aNew DelhibA P H Publishingc2004  a298p