Gupta , J. B. Switchgear and protection [Book /] J.B Gupta. - 2nd ed. - nai sarak : S.K Kataria & sons, 2004. - 700 p ; 24 cm. ISBN: 8188458414 Subjects--Geographic Terms: Protection. Dewey Class. No.: 978.179 National Library of Medicine Call No.: 978.179