@book{158561,
	author = {National Research Council (U.S.). and ebrary, Inc.},
	title = {Use of gray literature and other data in environmental epidemiology},
	publisher = {National Academy of Sciences,},
	year = {1997.},
	series = {Environmental epidemiology ;},
	address = {Washington, D.C. :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10041108}
}