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1Almmustuhtton 1993Fáttát “...Sports for children Psychological aspects....”
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2Dahkki Humphrey, James H. (James Harry), 1911-2008Fáttát “...Sports for children Psychological aspects....”
Almmustuhtton 2003
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3Almmustuhtton 2002Fáttát “...Sports for children United States....”
Girji