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Steven A. Heiskary has written:
'Lake water quality trends in Minnesota' -- subject(s): Lakes, Water quality
'Minnesota lake water quality assessment report' -- subject(s): Lakes, Pollution, Water, Water quality
'Trophic status of Minnesota lakes' -- subject(s): Eutrophication, Lake ecology, Water quality
'Acid rain' -- subject(s): Acid rain, Effect of water quality on, Environmental aspects of Acid rain, Fishes, Freshwater fishes, Lake ecology, Lakes, Measurement, Water quality
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