@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},
}