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2. Stimulus trace as a predictor of performance;Baumeister;Amer. J. ment. Defic.,1963
3. The organization of intelligence test performance in educable mentally subnormal children;Belmont;Amer. J. ment. Defic.,1967
4. PMA subscores in retardates and normals: Pattern, scatter, correlations and relation to etiology;Clausen;Amer. J. ment. Defic.,1965