@article {1558,
	title = {Forest decline, nutrient supply and diagnostic fertilisation in southwestern Germany and in southern California. },
	volume = {30},
	year = {1990},
	pages = {341-350},
	author = {Huettl, R.F. and Fink, S. and Lutz, H.J. and Poth, M. and Wisniewski, J.}
}
