00309nam a2200133Ia 4500008004100000020002200041082000800063082001000071100001700081245001100098260001400109260004300123260000900166230118s9999||||xx |||||||||||||| ||und||  a978-0-07-026215-7  a535  bGHA/O  aajoybghatak 0aoptics  anew delhi  btata mcgrawhill publishing company ltd  c2009