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