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Agricultural Education. Nature 170, 1049 (1952). https://doi.org/10.1038/1701049a0
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DOI: https://doi.org/10.1038/1701049a0
Nature volume 170, page 1049 (1952)
Agricultural Education. Nature 170, 1049 (1952). https://doi.org/10.1038/1701049a0
Issue Date:
DOI: https://doi.org/10.1038/1701049a0