@article {21,
	title = {Assessment of the magnitude of ammonia emissions in the United Kingdom.},
	journal = {Atmospheric Environment},
	volume = {29},
	year = {1995},
	pages = {1393-1411},
	author = {Sutton, M.A. and Place, C.J. and Eager, M. and Fowler, D. and Smith, R.I.}
}
