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Maps, Missals and Watermarks. Nature 218, 620–621 (1968). https://doi.org/10.1038/218620c0
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DOI: https://doi.org/10.1038/218620c0
Nature volume 218, pages 620–621 (1968)
Maps, Missals and Watermarks. Nature 218, 620–621 (1968). https://doi.org/10.1038/218620c0
Issue Date:
DOI: https://doi.org/10.1038/218620c0