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No Tax on Books and Papers. Nature 245, 113 (1973). https://doi.org/10.1038/245113a0
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DOI: https://doi.org/10.1038/245113a0
Nature volume 245, page 113 (1973)
No Tax on Books and Papers. Nature 245, 113 (1973). https://doi.org/10.1038/245113a0
Issue Date:
DOI: https://doi.org/10.1038/245113a0