Loew, E. A. Direct and alternating currents : theory and machinery / E. A. Loew and F. R. Bergseth. - 4th ed. - New York, McGraw-Hill, c 1954. - x, 637 p. ill. 24 cm. Include index 339 339 Subjects--Topical Terms: Electric currents.Electric machinery. LC Class. No.: / Dewey Class. No.: 621.31 / L825d