@misc{Olaczek_Romuald_IUCN_1985,
 author={Olaczek, Romuald},
 volume={41},
 number={6},
 editor={Research Centre for the Protection of Nature and Natural Resources 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={1985},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={pol},
 type={Text},
 title={IUCN Categories of threat to plant and animal species},
 URL={http://www.rcin.org.pl/Content/84448/PDF/KR038_104109_r1985-t41-no6_ChPO-Olaczek-5-21.pdf},
 keywords={IUCN},
}