@misc{_Protection_1955,
 volume={R. 23},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 address={Kraków},
 journal={Protection of Nature},
 howpublished={online},
 year={1955},
 publisher={Nature Protection Research Centre of the Polish Academy of Sciences},
 language={pol},
 title={Protection of Nature Ann. 23 (1955)},
 type={Text},
}