@misc{Klasa_Anna_Lutra_1999, author={Klasa, Anna and Wiśniowski, Bogdan}, volume={55}, number={3}, copyright={Creative Commons Attribution BY 3.0 PL license}, address={Kraków}, journal={Let's protect Our Indigenous Nature}, howpublished={online}, year={1999}, publisher={Institute of Nature Conservation of the Polish Academy of Sciences}, language={pol}, type={Text}, title={Lutra lutra in the Ojców National Park}, URL={http://rcin.org.pl/iop/Content/141251/PDF/KR038_166343_r1999-t55-no3_ChPO-Klasa-104-106.pdf}, keywords={Ojców National Park (Ojców, Poland), otter, Lutra lutra}, }