@misc{Witkowski_Zbigniew_Bioróżnorodność_2007, author={Witkowski, Zbigniew}, copyright={Creative Commons Attribution BY 3.0 PL license}, address={Kraków}, howpublished={online}, year={2007}, publisher={Institute of Nature Conservation of the Polish Academy of Sciences}, language={pol}, title={Bioróżnorodność i my}, type={Text}, URL={http://rcin.org.pl/Content/79387/PDF/KR038_97886_r2007_IntegOP-Witkowski-51-53.pdf}, keywords={biodiversity}, }