@book{6316,
	author = {Hill, Fredrick J. and Peterson, Gerald R.,},
	title = {Digital systems :},
	publisher = {Wiley,},
	year = {c1978.},
	address = {New York :},
	edition = {2d ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy0608/78007209-d.html}
}