@book{8172,
	author = {Brownson, Ross C.},
	title = {Applied epidemiology :},
	publisher = {Oxford University Press,},
	year = {2006.},
	address = {Oxford ;},
	edition = {2nd ed.},
	url = {http://www.loc.gov/catdir/toc/fy0701/2005053914.html}
}