@book{800,
	author = {Welkowitz, Walter and Deutsch, Sid,},
	title = {Biomedical Instruments :},
	publisher = {Academic Press,},
	year = {1992.},
	address = {San Diego :},
	edition = {2nd ed.},
	url = {http://www.loc.gov/catdir/description/els032/91018270.html}
}