@book{13769,
	author = {Hultberg, Hans. and Gårdsjön Roof Project.},
	title = {Experimental reversal of acid rain effects :},
	publisher = {John Wiley,},
	year = {c1998.},
	address = {Chichester [England] ;},
	url = {http://www.loc.gov/catdir/description/wiley031/97044585.html}
}