@misc{Włodarz_Bogdan_The_2020,
 author={Włodarz, Bogdan},
 editor={Szarek-Łukaszewska, Grażyna. Editor},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 address={Kraków},
 howpublished={online},
 year={2020},
 publisher={W. Szafer Institute of Botany, Polish Academy of Sciences},
 language={eng},
 title={The history of the Olkusz mining area of zinc and lead ores, and of the area of occurrence of Biscutella laevigata L.},
 type={Text},
 URL={http://www.rcin.org.pl/Content/210969/PDF/KR171_227026_Buckler-mustard_Wlodarz-History-Olkusz-mining.pdf},
}