[Use of complex indices in elaborating the hygienic classification of reservoirs by the degree of their pollution].
D006920:Hygiene; D008433:Mathematics; D008722:Methods; D014876:Water Pollution; D014881:Water Supply
Ispol'zovanie kompleksnykh pokazateleĭ pri razrabotke gigienicheskoĭ klassifikatsii vodoemov po stepeni ikh zagriazneniia.