[Effect of age when school begins on the physical development of urban and rural school children].
Sakharova
I N
IN
Atroshchenko
G N
GN
D002648:Child; D002657:Child Development / Q000502:physiology*; D006801:Humans; D010809:Physical Fitness; D012424:Rural Population; D012574:Schools; D012621:Seasons; D014505:Urban Population
Vliianie raznykh srokov nachala obucheniia na fizicheskoe razvitie gorodskikh i sel'skikh shkol'nikov.