@article {18,
	title = {Regional mass budgets of oxidized and reduced nitrogen and their relative contribution to the N inputs of sensitive ecosystems},
	journal = {Environmental Pollutution (Nitrogen Conference Special Issue)},
	volume = {102},
	year = {1998},
	pages = {337-342},
	chapter = {1},
	author = {Fowler, D. and Sutton, M.A. and Smith, R.I. and Pitcairn, C.E.R. and Coyle, M. and Campbel,l G. and Stedman, J.}
}
