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Wright, Richard F.; Matter, Albert; Schweingruber, Marc; Siegenthaler, Ulrich (1980). Sedimentation in Lake Biel, an eutrophic, hard-water lake in northwestern Switzerland. Schweizerische Zeitschrift für Hydrologie, 42(2), pp. 101-126. Birkhäuser 10.1007/BF02502430
