@book{26134,
	author = {Willett, Walter.},
	title = {Nutritional epidemiology /},
	publisher = {Oxford University Press,},
	year = {1998.},
	address = {New York :},
	edition = {2nd ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy0603/97037809-d.html}
}