@misc{Sikora_Arkadiusz_Śródlądowa_2015,
 author={Sikora, Arkadiusz},
 volume={71},
 number={6},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 journal={Let's protect Our Indigenous Nature},
 address={Kraków},
 howpublished={online},
 year={2015},
 publisher={Institute of Nature Conservation of the Polish Academy of Sciences},
 language={pol},
 title={Śródlądowa obserwacja foki pospolitej Phoca vitulina na Wiśle koło Gniewu},
 title={Inland record of harbour seal Phoca vitulina on the Vistula River near Gniew (Pomerania)},
 type={Text},
 URL={http://rcin.org.pl/iop/Content/144261/PDF/KR038_157637_r2015-t71-no6_ChPO-Sikora-460-462.pdf},
 keywords={harbour seal, Phoca vitulina},
}