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Dariusz Wrzesiński
Adam Mickiewicz University, Institute of Physical Geography and Environmental Planning, Chair of Hydrology and Water Management, Bogumiła Krygowskiego 10 str., 61-680Poznań, Poland
Leszek Sobkowiak
Adam Mickiewicz University, Institute of Physical Geography and Environmental Planning, Chair of Hydrology and Water Management, Bogumiła Krygowskiego 10 str., 61-680Poznań, Poland