@article {810,
	title = {Long term effects of ammonium sulphate on Calluna vulgaris},
	volume = {34},
	year = {1997},
	pages = {208-216},
	author = {Uren, S.C. and Ainsworth, N. and Power, S. and Cousins, D.A. and Huxendurp, L.M. and Ashmore, M.R.}
}
