@book{2257,
	author = {Ram, Badri. and Vishwakarma, D N.},
	title = {Power system protection and switchgear /},
	publisher = {Mc Graw Hill, },
	year = {c2010-2011.},
	address = {New Delhi:},
	edition = {2nd ed.},
	note = {Includes bibliographical references (p. 653-662) and index.}
}