Urban, Jan, Andrzej Tyc, Andrzej Kasza, and Marceli Ślusarczyk. “Scientific Documentation Required During the Exploration of Caves and Technical Work Carried Out in Tourist Show Caves ‒ Examples from Central Poland”. Geotourism/Geoturystyka, no. 48-49 (July 24, 2018): 4. Accessed July 22, 2024. https://journals.agh.edu.pl/geotour/article/view/2820.