00275nam a2200109Ia 4500008004100000082001500041100001500056245003000071250000800101260004300109300001300152190710s9999    xx            000 0 und d  a530.72 G74  aGoyal, R P 0aUnified practical physics  aIST  aIndorebShiva Lal Agarwal & Compc1996  aviii,203