Lawrence, Ralph R. Principles of alternating-current mechinery / , Ralph R. Lawrence. - New York : Mcgraw-Hill Book Company, Inc, c1953. - xx, 623 p. : ill. ; 24 cm. Includes index. English. LCCN: 80019632 Subjects--Topical Terms: Electric machinery. LC Class. No.: TK2182 / .M32 Dewey Class. No.: 621.31042/LAP