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Population Trends in the U.S.S.R. and the United States. Nature 192, 1142 (1961). https://doi.org/10.1038/1921142a0
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DOI: https://doi.org/10.1038/1921142a0
Nature volume 192, page 1142 (1961)
Population Trends in the U.S.S.R. and the United States. Nature 192, 1142 (1961). https://doi.org/10.1038/1921142a0
Issue Date:
DOI: https://doi.org/10.1038/1921142a0