00388nam a2200145Ia 4500008004100000020001500041082001400056100002000070245005600090260004600146300000800192650001200200650001800212653001200230170901s1974    xx            000 0 und d  a0471324116  a530bG71P  aGray, Robert L. 0aPhysics ProblemsbElectricity, Magnetism And Optics  aNew YorkbJohn Wiley And Sons, Inc.c1974  a158  aPhysics  aPure Sciences  aPhysics