@misc{_Protection_1968,
 volume={R. 33},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 journal={Protection of Nature},
 address={Kraków},
 howpublished={online},
 year={1968},
 publisher={Nature Protection Research Centre of the Polish Academy of Sciences},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={pol},
 type={Text},
 title={Protection of Nature Ann. 33 (1968)},
}