Geochemistry of natural waters of the Baydar valley (Crimean Peninsula) Larisa A. Nichkova, Dmitry A. Novikov, Anatoliy V. Chernykh, Fedor F. Dultsev, Galina A. Sigora and Tamara Yu. Khomenko E3S Web Conf., 98 (2019) 01036 Published online: 07 June 2019 DOI: 10.1051/e3sconf/20199801036