@misc{Berbeka_Krzysztof_Ekonomiczne_2007, author={Berbeka, Krzysztof}, 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={Ekonomiczne aspekty ochrony środowiska}, type={Text}, URL={http://www.rcin.org.pl/Content/80440/PDF/KR038_98234_r2007_IntegOP-Berbeka-237-241.pdf}, keywords={environment - protection - economic aspect}, }