@book{157600,
	author = {ebrary, Inc.},
	title = {Air quality guidelines for Europe},
	publisher = {World Health Organization, Regional Office for Europe,},
	year = {c2000.},
	series = {WHO regional publications. European series,},
	address = {Copenhagen :},
	edition = {2nd ed.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10040321}
}