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The effect of the presence of allochthonous organic matter on variations of the UV/Vis range radiation absorption in the southern and northern parts of recultivated Kortowskie Lake in Olsztyn (Mazurian Lakeland, longitude 21°27’E, latitude 53°46’N) is presented in this paper. The southern, “experimental”, part of the lake was supplied with waters of four tributaries, of which the Potok Leśny has a...
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