This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Anna Sołtys-Lelek
Ojców National Park, 32-045 Sułoszowa, Ojców 9, Poland
Wojciech Gruszka
Department of Biology, Morphological and Health Sciences, Faculty of Physical Culture in Gorzów Wlkp., University School of Physical Education in Poznań, Estkowskiego 13, 66-400 Gorzów Wlkp., Poland