@article {768,
	title = {Long-term trends in stream chemistry and biology in Northeast Scotland: Evidence for recovery},
	journal = {Water, Air and Soil Pollution},
	volume = {85},
	year = {1996},
	pages = {689-694},
	author = {Soulsby, C. and Turnbull, D. and Langan, S.J. and Owen, R. and Hirst, D.}
}
@article {621,
	title = {An empirical map of acidity for soils in Great Britain},
	journal = {Environmental Pollution},
	volume = {90},
	year = {1995},
	pages = {301-310},
	author = {Hornung, M. and Bull, K.R. and Cresser, M.S. and Hall, J. and Langan, S.J. and Loveland, P.J. and Smith, C.}
}
@inbook {622,
	title = {Acid Rain and its Impact: The Critical Loads Debate.},
	year = {1994},
	pages = {43-51},
	publisher = {Environmental Change Research Centre/ENSIS},
	organization = {Environmental Change Research Centre/ENSIS},
	chapter = {Mapping critical loads for the soils of Great Britain},
	address = {London},
	author = {Hornung, M. and Bull, K.R. and Cresser, M.S. and Loveland, P.J. and Langan, S.J. and Reynolds, B. and Robertson, W.H. and Battarbee, R.W. (Eds)}
}
@article {200,
	title = {The calculation of weathering rates and their role in the determination of critical loads},
	year = {1994},
	pages = {124-127},
	institution = {Environmental Change Research Centre/ENSIS},
	address = {London},
	author = {Langan, S.J. and Bain, D.C. and Wilson, M.J.},
	editor = {Battarbee, R.W.}
}
