@book{8082,
	author = {Kelsey, Jennifer L.},
	title = {Methods in observational epidemiology /},
	publisher = {Oxford University Press,},
	year = {1996.},
	address = {New York :},
	edition = {2nd ed.},
	note = {Main entry of previous ed. under Kelsey.},
	url = {http://www.loc.gov/catdir/enhancements/fy0603/95047816-d.html}
}