Interesting supergene Pb-rich mineral association from the Rovnost mining field, Jáchymov (St. Joachimsthal), Czech Republic - Sejkora, Jiří; Plášil, Jakub; Císařová, Ivana; Škoda, Radek; Hloušek, Jan; Veselovský, František; Jebavá, Ivana (Journal of Geosciences, 2011)