[Debatable questions of the hygienic regulation of the activities of schoolchildren].
Ivlev
V I
VI
D002648:Child; D002657:Child Development; D002668:Child Rearing; D006801:Humans; D006920:Hygiene; D007899:Leisure Activities; D010806:Physical Education and Training; D013177:Sports
Diskussionnye voprosy gigienicheskoĭ reglamentatsii deiatel'nosti shkol'nikov.