Metodological aspects in the studying of soil particle size distribution under contamination and after reclamationInna Zamulina, Marina Burachevskaya, Saglara Mandzhieva, Tatiana Bauer, Anatolii Barakhov and Mahmoud MazarjiE3S Web Conf., 169 (2020) 01025DOI: https://doi.org/10.1051/e3sconf/202016901025