For citations:
Kanatnikova N.V., Egorova N.A. THE IMPACT OF THE DRINKING WATER HARDNESS ON THE MORBIDITY RATE OF THE POPULATION OF THE CITY OF OREL. Hygiene and Sanitation. 2017;96(3):235-240. (In Russ.) https://doi.org/10.47470/0016-9900-2017-96-3-235-240