00285nam a2200109Ia 4500008004100000082001500041100001400056245004200070250001200112260004300124300000800167240913s9999||||xx |||||||||||||| ||und||  a539  SIN/I  aR.B.Singh 0aIntruduction to Modern Physics Vol II  a2nd Ed.  bNew Age InternationalaNew Delhic2010  a317