@book{181489,
	author = {Marston, R. M.},
	title = {Security electronics circuits manual /},
	publisher = {Butterworth-Heinemann,},
	year = {1998.},
	series = {A Newnes circuits manual},
	address = {Oxford ;},
	url = {http://www.loc.gov/catdir/description/els033/98022022.html}
}