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Railway Economics. Nature 183, 938–939 (1959). https://doi.org/10.1038/183938a0
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DOI: https://doi.org/10.1038/183938a0
Nature volume 183, pages 938–939 (1959)
Railway Economics. Nature 183, 938–939 (1959). https://doi.org/10.1038/183938a0
Issue Date:
DOI: https://doi.org/10.1038/183938a0