@article {298,
	title = {Factors influencing nitrogen saturation in forest ecosystems: Advances in our understanding since the mid 1980s. in the impact of nitrogen deposition on natural and semi-natural ecosystems},
	journal = {Kluwer Academic Press},
	year = {1999},
	address = {Dordrecht, NL},
	author = {Wilson, E.J. and Emmett, B.A.}
}
