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Twardy, S. (2012). The ecological potential – sustainable development of rural areas in the Carpathians..
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Twardy, S., & Kopacz, M. (2015). The role of permanent grasslands in mountain areas: Study on agri-environmental importance of permanent grasslands – based on research carried out in the upper Dunajec River basin and Grajcarek Stream basin. 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..
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Twardy, S., & Kopacz, M. (2014). Sustainable and durable development of mountain areas..
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