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Scientific American

July 1, 1943

1 min read

'Wers' Calling

Radio Amateurs and Other Volunteer Workers are Setting Up a Communications System for War or Peace

By Ulysses S. Grant

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This article was originally published with the title “Wers Calling” in Scientific American Magazine Vol. 169 No. 1 (July 1943), p. 23
doi:10.1038/scientificamerican0743-23

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