@misc{_Protection_1920-2000,
 copyright={Creative Commons Attribution BY 3.0 PL license},
 address={Warszawa},
 address={Kraków},
 journal={Protection of Nature},
 howpublished={online},
 year={1920-2000},
 publisher={Nature Protection Committee of the Polish Academy of Sciences and Lettres},
 publisher={Nature Protection Research Centre of the Polish Academy of Sciences},
 publisher={Research Centre for the Protection of Nature and Natural Resources of the Polish Academy of Sciences},
 publisher={Institute of Nature Conservation of the Polish Academy of Sciences},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={pol ; eng},
 type={Text},
 title={Protection of Nature},
}