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Walker, Harry A.; Bortner, Morton – Journal of Autism and Childhood Schizophrenia, 1975
Descriptors: Children, Classification, Cognitive Processes, Concept Formation
Coates, Brian; Moffitt, Alan R. – Amer J Ment Deficiency, 1969
Descriptors: Cognitive Processes, Discrimination Learning, Exceptional Child Research, Intelligence Differences