Chadwick, W.
(1961),
Variations in frequency of occurrence of sporadic E, 1949-1959:, , National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NBS.TN.117
(Accessed December 14, 2024)
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Variations in frequency of occurrence of sporadic E, 1949-1959:
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- NBS TN 117
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NBS TN 117
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NIST Pubs
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Created January 1, 1961, Updated May 19, 2023