00471nam a22001817a 4500 116638 116637 OSt 20260706112936.0 201021b ||||| |||| 00| 0 eng d 9789386649447 539 RAO Rao,Narayana B V 283 Modern physics by B V Narayana Rao 2ed. London New age international publishers 2018 470p. Laser Electron X-Rays ddc BK