[ENDEMIC NEPHRITIS IN BULGARIA AND SANITARY-EPIDEMIOLOGIC STUDY OF ITS ETIOLOGY].
D002031:Bulgaria; D016021:Epidemiologic Studies; D004813:Epidemiology; D009393:Nephritis; D014116:Toxicology; D014131:Trace Elements; D014881:Water Supply
D014131:Trace Elements
BULGARIA; EPIDEMIOLOGY; NEPHRITIS; TOXICOLOGIC REPORT; TRACE ELEMENTS; WATER SUPPLY
ENDEMICHESKI I NEFRIT V BOLGARII I SANITARNO-'EPIDEMILOGICHESKOE IZUCHENIE EGO ETIOLOGII.