@misc{Michalik_Stefan_Protection_1974,
 author={Michalik, Stefan},
 volume={30},
 number={1},
 editor={Research Centre for the Protection of Nature of the Polish Academy of Sciences},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 address={Warszawa},
 address={Kraków},
 journal={Let's protect Our Indigenous Nature},
 howpublished={online},
 year={1974},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={pol},
 type={Text},
 title={Protection of nature and recreation},
 URL={http://rcin.org.pl/Content/83660/PDF/KR038_106388_r1974-t30-no1_ChPO-Michalik-7-13.pdf},
}