Piaget's analysis of class inclusion : right or wrong? / by Geldolph A. Kohnstamm
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Piaget's analysis of class inclusion : right or wrong? / by Geldolph A. Kohnstamm
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Ook verschenen als proefschrif ...... ian problem of class inclusion
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Piaget's analysis of class inclusion : right or wrong?
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Piaget's analysis of class inclusion : right or wrong? / by Geldolph A. Kohnstamm