Abstract
PRINCIPAL PEDERSEN, of the Technical College, Copenhagen, has communicated a paper English on "Wireless Echoes of Long Delay"to physical section of the Danish Royal Society, which shows that scientific workers hold very different opinions on this subject.
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Long Delayed Radio Echoes. Nature 124, 164 (1929). https://doi.org/10.1038/124164a0
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DOI: https://doi.org/10.1038/124164a0
