Twardy, S. (2012). Contamination of surface water bodies with biogenic substances, taking into account the impact of agriculture in the Western Carpathians..
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Twardy, S. (2012). The ecological potential – sustainable development of rural areas in the Carpathians..
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Twardy, S. (2013). The usefulness of the research results conducted on the permanent grasslands for carrying out the pro-environmental management in mountain areas..
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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..
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Twardy, S., & Kopacz, M. (2014). Sustainable and durable development of mountain areas..
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