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Science and Mathematics in Schools. Nature 182, 1485 (1958). https://doi.org/10.1038/1821485b0
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DOI: https://doi.org/10.1038/1821485b0
Nature volume 182, page 1485 (1958)
Science and Mathematics in Schools. Nature 182, 1485 (1958). https://doi.org/10.1038/1821485b0
Issue Date:
DOI: https://doi.org/10.1038/1821485b0