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Agriculture: Farming Maps. Nature 223, 770–771 (1969). https://doi.org/10.1038/223770b0
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DOI: https://doi.org/10.1038/223770b0
Nature volume 223, pages 770–771 (1969)
Agriculture: Farming Maps. Nature 223, 770–771 (1969). https://doi.org/10.1038/223770b0
Issue Date:
DOI: https://doi.org/10.1038/223770b0