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Mathematics and Children. Nature 185, 581 (1960). https://doi.org/10.1038/185581d0
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DOI: https://doi.org/10.1038/185581d0
Nature volume 185, page 581 (1960)
Mathematics and Children. Nature 185, 581 (1960). https://doi.org/10.1038/185581d0
Issue Date:
DOI: https://doi.org/10.1038/185581d0