@article {996,
	title = {Macro-floral assemblages in upland Welsh streams in relation to acidity and their importance to invertebrates.},
	volume = {18},
	year = {1987},
	pages = {545-557},
	author = {Ormerod, S.J. and Wade, K.R. and Gee, A.S.}
}
@article {776,
	title = {The effects of acidification on the ecology of streams in the upper Tywi catchment in west Wales. },
	volume = {35},
	year = {1984},
	author = {Stoner, J.H. and Gee, A.S. and Wade, K.R.}
}
