@misc{Michalik_Stefan_Zagadnienia_1979,
 author={Michalik, Stefan},
 volume={R. 42},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 address={Warszawa},
 address={Kraków},
 journal={Protection of Nature},
 howpublished={online},
 year={1979},
 publisher={Nature Protection Research Centre of the Polish Academy of Sciences},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={pol},
 type={Text},
 title={Zagadnienia ochrony zagrożonych gatunków w Polsce},
 title={Some problems of the conservation of threatened plant species in Poland},
 URL={http://rcin.org.pl/Content/120948/PDF/KR038_112685_r1979-r42_OP-Michalik-11-28.pdf},
 keywords={threatened species},
}