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1. J. Kowalski: Hydrology with fundamentals of geology, 3rd edition corrected and completed, Publishing House of the University of Life Sciences in Wrocław, Wrocław 2007, p. 116;
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2. Ibidem, p. 116;
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3. J. Kowalski: Hydrology with fundamentals of geology, 3rd edition corrected and completed, Publishing House of the University of Life Sciences in Wrocław, Wrocław 2007, p. 117.
]Search in Google Scholar