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Behavior changes resulting from a study of communicable diseases : an evaluation of the effects of learning on certain actions of high school pupils / by John Urban.

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Behavior changes resulting from a study of communicable diseases : an evaluation of the effects of learning on certain actions of high school pupils / by John Urban.

Effect of age and experience on tests of intelligence / by Vernon A. Jones.

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Behavior changes resulting from a study of communicable diseases : an evaluation of the effects of learning on certain actions of high school pupils / by John Urban.

Effect of age and experience on tests of intelligence / by Vernon A. Jones.