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Teaching Mathematics in the Junior School. Nature 189, 20 (1961). https://doi.org/10.1038/189020c0
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DOI: https://doi.org/10.1038/189020c0
Nature volume 189, page 20 (1961)
Teaching Mathematics in the Junior School. Nature 189, 20 (1961). https://doi.org/10.1038/189020c0
Issue Date:
DOI: https://doi.org/10.1038/189020c0