Electromagnetism: Block 3: the magnetic Field/ Print Resources by The Open University.- - Milton Keynes: The Open University, c1980. - iv, 555p.: ill.; 29cm. - The Open University Science/Mathematics: A Third Level Course . Includes Index Source: B-13544 Subjects--Topical Terms: Electromagnetism-Science/Mathematics--Textbook LC Class. No.: QC665.E4 / .O63 1980