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Radio AIDS to Navigation, Satellite Navigation Systems, Legal Time, Radio Time Signals and Electronic Position Fixing Systems (Admiralty List of Radio Signals): 9780707744018 - AbeBooks
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Radio Aids - Radio Aids to Navigation. R. A. Smith; Cambridge University Press (Modern Radio Technique Series); November 1947; 114, xi, 7 plates; cloth bound 8·7 × 5·4 inches; price 9s. | The Journal of Navigation | Cambridge Core
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