@book{9237,
	author = {McNeil, Don,},
	title = {Epidemiological research methods /},
	publisher = {John Wiley,},
	year = {1996.},
	series = {Wiley series in probability and statistics},
	address = {New York :},
	url = {http://www.loc.gov/catdir/description/wiley031/96190443.html}
}