@book{78819,
	author = {Berkman, Robert I. and Shumway, Christopher A.},
	title = {Digital dilemmas :},
	publisher = {Iowa State Press,},
	year = {2003.},
	address = {Ames :},
	url = {http://www.loc.gov/catdir/toc/fy038/2003009335.html}
}