@book{187048,
	author = {Heckrath, Goswin. and ebrary, Inc.},
	title = {Tools for assessing phosphorus loss from Nordic agriculture},
	publisher = {Nordic Council of Ministers,},
	year = {2005.},
	address = {Copenhagen :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10581028}
}