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Twardy, S., & Kopacz, M. (2014). Sustainable use of mountain lands as a basis of permanent quality maintaining of natural environment. Falenty-Krakow.
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Twardy, S., & Kopacz, M. (2014). Comparison of concentrations and loads of macronutrients brought with precipitation and leaching from the soil profile. Pol. J. Environ. Stud., 23(3a), 132–136.
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