[Hygienic rationalization of the daily schedule for schoolchildren living in the extreme North].
D000293:Adolescent; D001110:Arctic Regions; D002648:Child; D002940:Circadian Rhythm; D003081:Cold Climate; D003479:Curriculum; D006801:Humans; D012572:School Health Services / Q000458:organization & administration*; D012800:Siberia
Gigienicheskaia ratsionalizatsiia rezhima dnia shkol'nikov Kraĭnego Severa.