[Irrigation of fields by sewage water and sanitary protection of water reservoirs].
D012722:Sewage; D014867:Water; D014876:Water Pollution
D012722:Sewage; D014867:Water
SEWAGE; WATER POLLUTION
OB OROSHENII sel'skokhoziaistvennykh polei stochnymi vodami i o sanitarnoi okhrane vodoemov.