V. J. Jones, R. J. Flower, P. G. Appleby, J. Natkanski, N. Richardson, B. Rippey, A. C. Stevenson, R. W. Battarbee, Palaeolimnological Evidence for the Acidification and Atmospheric Contamination of Lochs in the Cairngorm and Lochnagar Areas of Scotland, Journal of Ecology, Vol. 81, No. 1 (Mar., 1993), pp. 3-24
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Jones et al. (1993) studied this question.
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