@misc{Nowicki_Wiesław_Ptaki_2001, author={Nowicki, Wiesław}, copyright={Rights Reserved - Restricted Access}, address={Warszawa}, howpublished={online}, year={2001}, publisher={Muzeum i Instytut Zoologii PAN}, language={pol}, title={Ptaki śródmieścia Warszawy}, keywords={Aves, Poland, Warsaw, birds}, }