Authors
Alicja Pradela
Department of Physical Geography, Faculty of Earth Sciences, Będzińska Str. 60, 41-200, Sosnowiec, Poland
Andrzej Zygmuniak
Faculty of Mining and Geology, Silesian University of Technology, Akademicka Str. 2,, Gliwice, Poland
© 2017 Alicja Pradela, Andrzej Zygmuniak, published by University of Silesia in Katowice, Faculty of Natural Sciences
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.