@misc{Bednorz_Jan_Bocian_1974, author={Bednorz, Jan}, volume={R. 39}, copyright={Creative Commons Attribution BY 3.0 PL license}, address={Warszawa}, address={Kraków}, journal={Protection of Nature}, howpublished={online}, year={1974}, publisher={Nature Conservation Research Centre of the Polish Academy of Sciences}, publisher={Państwowe Wydawnictwo Naukowe}, language={pol}, title={Bocian czarny, Ciconia nigra (L.) w Polsce}, title={The black stork, Ciconia nigra (L.) in Poland}, type={Text}, URL={http://rcin.org.pl/iop/Content/164625/PDF/KR038_198792_r1974-r39_OP-Bednorz-201-243.pdf}, }