[Hygienic evaluation of the duration of agricultural work for 5th-7th grade students during the summer vacation].
D000383:Agriculture; D006801:Humans; D012572:School Health Services; D013334:Students
AGRICULTURE; SCHOOL HEALTH
Gigienicheskoe obosnovanie prodolzhitel'nosti sel'skokhoziaistvennoi raboty v techenie dnia dlia uchashchikhsia V-VII klassov vo vremia letnikh kanikul.