@misc{Alexandrowicz_Zofia_6._2000,
 author={Alexandrowicz, Zofia and Urban, Jan},
 volume={Nr 46},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 address={Kraków},
 journal={Studia Naturae},
 howpublished={online},
 year={2000},
 publisher={Institute of Nature Conservation of the Polish Academy of Sciences},
 language={pol},
 type={Text},
 title={6. Current state of the Crystal Caves' preservation},
 URL={http://www.rcin.org.pl/Content/84569/PDF/KR038_93059_r2000-t46_SN-Alexandrowicz-59-80.pdf},
 keywords={Wieliczka salt mine, Crystal Caves},
}