00289nam a2200121Ia 4500008004100000082000800041082001000049100002200059245003400081260002100115260002200136260000900158230118s9999||||xx |||||||||||||| ||und||  a539  bGUP/C  asatish k.bguptha 0amodern ,s abc physics (vol11)  anew delhi,kochin  bmodern publishers  c1990