Steinmetz, Charles Proteus, 1865-1923. Theoretical elements of electrical engineering / by Charles Proteus Steinmetz ... - 4th ed., - New York [etc.] McGraw-Hill Book Company, inc., 1915. - xiii, 368 p. illus., diagrs. 25 cm. Subjects--Topical Terms: INGENIERIA ELECTRICAELECTRICIDAD Universal Decimal Class. No.: 621.3