[HYGIENIC EVALUATION OF THE EFFECTIVENESS OF THE VNIIGIM DESIGN SLOW FILTERS IN RURAL WATER SYSTEMS].
D005374:Filtration; D012423:Rural Health; D012424:Rural Population; D014586:USSR; D014867:Water; D014876:Water Pollution; D014881:Water Supply
D014867:Water
FILTRATION; RURAL HEALTH; USSR; WATER POLLUTION; WATER SUPPLY
GIGIENICHESKAIA OTSENKA 'EFFEKTIVNOSTI RABOTY MEDLENNYKH FIL'TROV KONSTRUKTSII VNIIGIM DLIA SEL'SKIKH VODOPROVODOV.