@misc{Krzyżanek_Edward_Natural_1977, author={Krzyżanek, Edward}, volume={33}, editor={Research Centre for the Protection of Nature of the Polish Academy of Sciences}, number={5-6}, copyright={Creative Commons Attribution BY 3.0 PL license}, journal={Let's protect Our Indigenous Nature}, address={Warszawa}, address={Kraków}, howpublished={online}, year={1977}, publisher={Państwowe Wydawnictwo Naukowe}, language={pol}, title={Natural monuments perish in the region of Pszczyna}, type={Text}, URL={http://rcin.org.pl/iop/Content/124098/PDF/KR038_149993_r1977-t33-no5-6_ChPO-Krzyzanek-67-71.pdf}, }