@misc{Kruszelnicki_Jerzy_Natural_2003,
 author={Kruszelnicki, Jerzy},
 volume={59},
 number={6},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 journal={Let's protect Our Indigenous Nature},
 address={Kraków},
 howpublished={online},
 year={2003},
 publisher={Institute of Nature Conservation of the Polish Academy of Sciences},
 language={pol},
 title={Natural values of the proposed Mazury Lakes Biosphere Reserve},
 type={Text},
 URL={http://www.rcin.org.pl/Content/107571/PDF/KR038_111213_r2003-t59-no6_ChPO-Kruszelnicki-5-13.pdf},
 keywords={Mazury (region)},
}