00341nam a2200157Ia 4500008004100000020000900041035001000050082001700060100002100077245003300098250000600131260002300137300000800160500000900168650000600177210723s9999||||xx |||||||||||||| ||und||  aNULL  a24412  a537.538BTOM  aTombouloan, D. H 0aElectric And Magnetic Fields  a-  aNew YorkbHarcourt  a479  a9581  a-