Uppal, S. L. Electrical power : generation, transmission, distribution, switchgear and protection, utilization of electrical energy and electric traction / - 15th ed. - Delhi : Khanna Publishers. ; 2002 - 1740 p. : ill. ; 23 cm. Includes index. ISBN: NA LC Class. No.: D4420 Dewey Class. No.: 621.31 / UPP