@book{18047,
	author = {Beaglehole, R. and Bonita, R. and ebrary, Inc.},
	title = {Basic epidemiology},
	publisher = {World Health Organization,},
	year = {1993.},
	address = {Geneva :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10002892}
}