Geological Map Lausitz-Jizera-Karkonosze and Muskau Arch Geopark as examples of cross-border cooperation of the national geological surveys of Poland, the Czech Republic and Germany
Jacek Robert Kasiński, Wiesław Kozdrój, Jacek Koźma, Ottomar Krentz, Mojmir Opletal, Andrzej Stachowiak