The activity of selected gamma radionuclides in the Tatra National Park Barbara Kubica, Marcin Stobiński, Grzegorz Szaciłowski and Katarzyna Szarłowicz E3S Web Conf., 14 (2017) 02036 Published online: 15 March 2017 DOI: 10.1051/e3sconf/20171402036