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© 1941 by The Regents of the University of California
1941
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L.C. Gray; America’s Ears: Twenty-four Hours a Day Short-Wave Listening Posts Are Keeping Tabs On Air Communications. Current History 10 January 1941; 52 (7): 12–14. doi: https://doi.org/10.1525/curh.1941.52.7.12
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