@misc{Urban_Jan_9.7._2000,
 author={Urban, Jan and Otęska-Budzyn, Janina},
 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={9.7. Contemporary changes in the crystal morphology and walls' relief of the caves},
 URL={http://rcin.org.pl/Content/115260/PDF/KR038_122059_r2000-t46_SN-Urban-170-173.pdf},
 keywords={Wieliczka salt mine, Crystal Caves},
}