Clayton, Albert Edmund. 1886- Elementary electrical engineering / Albert E. Clayton and Herbert J. Shelley. - 4th ed. - London : Longmans, c1961. - xii, 490 p.: illus., tables, diagrs. 19 cm. Includes Index . english LCCN: 67082838 Nat. Bib. No.: B67-794 Subjects--Topical Terms: Electrical engineering. LC Class. No.: TK146 / .C48 1966 Dewey Class. No.: 621.3/CLE