Duffin, W J Electricity and magnetism . - 3rd ed. - England: McGraw-Hill Book Co. (UK) Ltd., 1980. - xxvi, 467p.; 23cm "N" ISBN: "07 084130 6" Subjects--Topical Terms: 1.Electricity 2. Magnetism Subjects--Index Terms: "Y" LC Class. No.: QC522 / .D84