00256nam a22000977a 4500003000400000008004100004082001400045100001600059245004500075260003800120OSt230915b        |||||||| |||| 00| 0 eng d  a530bG71P  aGray, R. L.  aPhysics Problems : Electricity magnatism  aNew YorkbJohn Wiley & Sonsc1974