@misc{_Protection_1973,
 volume={R. 38},
 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={Protection of Nature},
 howpublished={online},
 year={1973},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={pol ; eng},
 title={Protection of Nature Ann. 38 (1973)},
 type={Text},
}