00301nam a2200133Ia 4500008004100000020001800041082001100059082001000070100001700080245001900097260001300116260002900129260000900158230118s9999||||xx |||||||||||||| ||und||  a81-219-1095-1  a539.14  bGHO/A  as.nbghoshal 0aatomic physics  anewdelhi  bs. chand and company ltd  c1991