@misc{Dutkiewicz_Jacek_The_1958, author={Dutkiewicz, Jacek}, volume={14 nowa seria}, number={4}, copyright={Creative Commons Attribution BY 3.0 PL license}, address={Kraków}, journal={Let's protect Our Indigenous Nature}, howpublished={online}, year={1958}, publisher={Państwowe Wydawnictwo Naukowe}, language={pol}, type={Text}, title={The Fresh-water Pearl Mussel Margaritifera margaritifera L. a vanishing species}, URL={http://www.rcin.org.pl/Content/80651/PDF/KR038_103079_r1958-t14-no4_ChPO-Dutkiewicz-19-28.pdf}, keywords={molluscs, Mollusca, Margaritifera margaritifera}, }