@misc{Głowaciński_Zbigniew._Editor_Categories_1992, author={Głowaciński, Zbigniew. Editor and Połczyńska-Konior, Grażyna. Assistant Editor}, copyright={Creative Commons Attribution BY 3.0 PL license}, address={Kraków}, howpublished={online}, year={1992}, publisher={Nature Protection Research Centre of the Polish Academy of Sciences}, language={pol}, language={eng}, title={Categories of threat}, type={Text}, URL={http://rcin.org.pl/Content/171199/PDF/KR038_181704_r1992_CzLZ-Glowacinski-11-12.pdf}, keywords={Red List, animals - threatened species}, }