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Council for the Promotion of Field Studies. Nature 169, 650 (1952). https://doi.org/10.1038/169650b0
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DOI: https://doi.org/10.1038/169650b0
Nature volume 169, page 650 (1952)
Council for the Promotion of Field Studies. Nature 169, 650 (1952). https://doi.org/10.1038/169650b0
Issue Date:
DOI: https://doi.org/10.1038/169650b0