Orłowska, Anna. 2018. “Evaluation of the Geotourism Potential of Selected Geological Sites in the Eastern Part of the Borderland Between the Siedlce Upland and Łuków Plain”. Geotourism/Geoturystyka, no. 48-49 (July):2. https://doi.org/10.7494/geotour.2017.48-49.2.