Radioactivity of waste materials coming from the largest power plants in PolandAneta Łukaszek-Chmielewska, Martin Girard, Barbara Piotrowska, Karol Wojtkowski, Krzysztof Isajenko, Olga Stawarz and Robert GodlewskiE3S Web Conf., 100 (2019) 00051DOI: https://doi.org/10.1051/e3sconf/201910000051