@book{4111,
	author = {Selvin, S.},
	title = {Statistical analysis of epidemiologic data /},
	publisher = {Oxford University Press,},
	year = {2004.},
	address = {Oxford ;},
	edition = {3rd ed.},
	url = {http://www.loc.gov/catdir/toc/fy051/2003066214.html}
}