@book{175169,
	author = {Summers, Charles K. and Dunetz, Bryant.},
	title = {ISDN :},
	publisher = {John Wiley,},
	year = {1996.},
	address = {New York :},
	url = {http://www.loc.gov/catdir/enhancements/fy0706/95045824-b.html}
}