@misc{Witkowski_Zbigniew_The_1984,
 author={Witkowski, Zbigniew},
 volume={40},
 editor={Research Centre for the Protection of Nature and Natural Resources of the Polish Academy of Sciences},
 number={5-6},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 journal={Let's protect Our Indigenous Nature},
 address={Warszawa},
 address={Kraków},
 howpublished={online},
 year={1984},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={pol},
 title={The endangerment and protection of the butterfly Parnassius apollo in Europe},
 type={Text},
 URL={http://www.rcin.org.pl/Content/71412/PDF/KR038_91069_r1984-t40-no5-6_ChPO-Witkowski-86-92.pdf},
 keywords={Parnassius apollo},
}