Archaeology and natural background of the Lower Beskid Mountains, Carpathians [results of the Polish-Slovak Research carried out by the Institute of Archaeology and Ethnology of Polish Academy of Sciences and the Archaeological Institute of Slovak Academy of Sciences ; in memoriam of Vojtech Budinský-Krička and Stanislav Šiška, the eminent researchers of the past of Eastern Slovakia] = Archeologia i środowisko naturalne Beskidu Niskiego w Karpatach - Machnik, Jan; Budinský-Krička, Vojtech; Šiška, Stanislav (Prace Komisji Prehistorii Karpat // Polska Akademia Umieje̜tności)