[Psychohygienic basis for the academic load of schoolchildren in the lower grades].
D002490:Central Nervous System / Q000502:physiology; D002648:Child; D006801:Humans; D008433:Mathematics; D008603:Mental Health; D008606:Mental Processes / Q000502:physiology; D011603:Psychophysiology; D013334:Students / Q000523:psychology*
Psikhogigienicheskoe obosnovanie uchebnoĭ nagruzki shkol'nikov mladshikh klassov.