[Economic effectiveness of hygienic measures to improve the lighting of school buildings].
D002648:Child; D006801:Humans; D006920:Hygiene; D008029:Lighting / Q000191:economics*; D009216:Myopia / Q000191:economics; D012574:Schools / Q000191:economics*; D014586:USSR
Ekonomicheskaia éffektivnost' gigienicheskikh meropriiatiĭ po uluchsheniiu osveshcheniia shkol'nykh zdaniĭ.