Puchstein, A. F. Alternating-current machines / A. F. Puchstein, T. C. Lloyd and A. G. Conrad. - 3rd ed. - New York : John Wiley & sons, c 1942. - xii, 655 p. : ill. ; 23 cm. Includes index. 310 310 Subjects--Topical Terms: Electric machinery --Alternating current. Dewey Class. No.: 621.31 / P961a