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Das, J. P. | 1 |
Rydberg, Sven | 1 |
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Rydberg, Sven – Perceptual and Motor Skills, 1971
Descriptors: Attention Span, Beginning Reading, Discrimination Learning, Learning Processes

Das, J. P. – American Journal of Mental Deficiency, 1970
Descriptors: Attention Span, Exceptional Child Research, Learning Processes, Mental Retardation