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Grzegorz Duniec
Institute of Meteorology and Water Management - National Research Institute, ul. Podleśna 61, 01-673 Warszawa, Poland, phone +48 22 569 41 34, fax +48 22 569 43 56
Andrzej Mazur
Institute of Meteorology and Water Management - National Research Institute, ul. Podleśna 61, 01-673 Warszawa, Poland, phone +48 22 569 41 34, fax +48 22 569 43 56