@book{22635,
	author = {Lal , Brij. and Subrahmanyam, N. .},
	title = {A Text Book of Electricity and Magnetism /},
	publisher = {Ratan Prakashan Mandir ,},
	year = {1999.},
	address = {Agra :},
	edition = {20 th Rev.ed. /}
}