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