00291nam a2200121Ia 4500008004100000082000800041082001000049100002200059245003600081260002100117260002200138260000900160230118s9999||||xx |||||||||||||| ||und||  a539  bGUP/R  asathish kbguptha 0amodern,s abc of physics voll 11  anew delhi,kochin  bmodern publishers  c1990