00381nam a2200145Ia 4500008004100000020001500041082001400056100002000070245005500090260004000145300000800185650001200193650001800205653001200223170901s1974    xx            000 0 und d  a0471324116  a530bG71P  aGray, Robert L. 0aPhysics ProblemsbElectricity,Magnetism and Optics  aNew YorkbJohn Wiley and Sonsc1974  a158  aPhysics  aPure Sciences  aPhysics