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A. G. Johnels, T. Westermark, W. Berg, P. I. Persson, , Pike (Esox lucius L.) and Some Other Aquatic Organisms in Sweden as Indicators of Mercury Contamination in the Environment, Oikos, Vol. 18, No. 2 (1967), pp. 323-333
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Johnels et al. (1967) studied this question.
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