River water quality Amudarya in territory of KarakalpakstanUmida Sadikova, Islom Usmanov, Nurbek Rakhimov, Shavkat Usmanov, Tolibjon Kudratov and Zulfiya MirkhasilovaE3S Web of Conf., 401 (2023) 02008DOI: https://doi.org/10.1051/e3sconf/202340102008