[SCHOOLS WITH 2-SIDED CLASSROOM LIGHTING].
D006801:Humans; D008027:Light; D008029:Lighting; D012572:School Health Services; D012574:Schools; D013696:Temperature; D014586:USSR
LIGHTING; SCHOOL HEALTH; SCHOOLS; TEMPERATURE; USSR
SHKOLY S DVUSTORONNE I ORIENTATSIE I KLASSNYKH POMESHCHENI I.