00572nam a2200193Ia 4500082001200000100001500012245011700027260002800144300000800172650002500180650002700205650002500232650001400257650002500271650002200296650002300318650002100341710001600362  aTA.0145  aAmir Singh 0aStudy of the effect of age and school environment on fluid and crystallized intelligence of high school children  c1973bPanjab University  a130  vIntelligence and age  aMental ability and age  aHigh school students  aIntellect  aAge and intelligence  aIntellect and age  aSchool environment  aAge (Psychology)  aHundal, P.S