@misc{Olaczek_Romuald_A_1968,
 author={Olaczek, Romuald},
 volume={24 nowa seria},
 number={1},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 journal={Let's protect Our Indigenous Nature},
 address={Kraków},
 howpublished={online},
 year={1968},
 publisher={Polish Academy of Sciences},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={pol},
 title={A new to Poland locality of the mute swan, Cygnus olor, near the town of Łowicz},
 type={Text},
 URL={http://rcin.org.pl./Content/83571/PDF/KR038_103192_r1968-t24-no1_ChPO-Olaczek-56-59.pdf},
 keywords={mute swan, Cygnus olor},
}