00323nam a2200133Ia 4500008004100000020001500041041001200056082001600068100001900084245003500103260003100138300000800169650001200177221030s9999    xx            000 0 und d  a8126103124  aEnglish  a105.23bUpa  aT. C. Upadhyay 0aIntroduction to Modern Physics  bAnmol PubaNew Delhic1999  a230  aPhysics