[ON SOME PROBLEMS IN SCHOOL HYGIENE IN THE SOVIET BALTIC AREA].
D001454:Baltic States; D004957:Estonia; D006801:Humans; D006920:Hygiene; D007844:Latvia; D002094:Republic of Belarus; D012572:School Health Services; D012574:Schools
BELORUSSIA; ESTONIA; LATVIA; SCHOOL HEALTH; SCHOOLS
O NEKOTORYKH VOPROSAKH SHKOL'NO I GIGIENY V SOVETSKO I PRIBALTIKE.