@book{9771,
	author = {Duff, John R.; and Herman, Stephen L.},
	title = {Alternating Current Fundamentals /},
	publisher = {Delmar Learning,},
	year = {1991`.},
	address = {New York :},
	url = {http://www.amazon.com/exec/obidos/ASIN/0827311338/chopaconline-20}
}