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The falling index. Nature 307, 201 (1984). https://doi.org/10.1038/307201c0
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DOI: https://doi.org/10.1038/307201c0
Nature volume 307, page 201 (1984)
The falling index. Nature 307, 201 (1984). https://doi.org/10.1038/307201c0
Issue Date:
DOI: https://doi.org/10.1038/307201c0