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Dr G. A. Reay. Nature 229, 643 (1971). https://doi.org/10.1038/229643a0
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DOI: https://doi.org/10.1038/229643a0
Nature volume 229, page 643 (1971)
Dr G. A. Reay. Nature 229, 643 (1971). https://doi.org/10.1038/229643a0
Issue Date:
DOI: https://doi.org/10.1038/229643a0