@misc{Jakuczun_Bogdan_The_1972,
 author={Jakuczun, Bogdan},
 volume={28},
 number={4},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 address={Kraków},
 journal={Let's protect Our Indigenous Nature},
 howpublished={online},
 year={1972},
 publisher={Polish Academy of Sciences},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={pol},
 type={Text},
 title={The first ravens of natural breeding in the Wolin National Park},
 URL={http://rcin.org.pl/Content/74034/PDF/KR038_95358_r1972-t28-no4_ChPO-Jakuczun-42-44.pdf},
 keywords={ravens, Wolin National Park, Corvus corax},
}