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Science in Education and Industry . Nature 97, 390 (1916). https://doi.org/10.1038/097390a0
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DOI: https://doi.org/10.1038/097390a0
Nature volume 97, page 390 (1916)
Science in Education and Industry . Nature 97, 390 (1916). https://doi.org/10.1038/097390a0
Issue Date:
DOI: https://doi.org/10.1038/097390a0