[Hygienic basis for the time of using natural lighting in children's preschool institutions and general education schools in the various light-climate regions of the USSR].
D002648:Child; D002675:Child, Preschool; D002980:Climate; D006801:Humans; D008027:Light; D008029:Lighting; D012572:School Health Services; D012574:Schools; D012621:Seasons; D013997:Time Factors; D014586:USSR
Gigienicheskoe obosnovanie vremeni ispol'zovaniia estestvennogo osveshcheniia v detskikh doshkol'nykh uchrezhdeniiakh i obshcheobrazovatel'nykh shkolakh razlichnykh svetoklimaticheskikh raĭonov USSR.