gupta , jb. a course in power systems [[Book] /] J.B GUPTA. - 9th.ed. - NEW DELHI : s.k katariaz sons, 2004. - 691P. ; 27cm. All age. ISBN: 818845852x Subjects--Topical Terms: Electric power systems. .Electric power transmission.Electric power distribution. Dewey Class. No.: 621.31