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        Efficient Use of the Radio Spectrum; NBS Technical Note 158

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        Efficient Use of the Radio Spectrum; NBS Technical Note 158
          1. A Note on the Propagation of Certain LF Pulses Utilized in a Radio Navigation System; NBS Technical Note 118

            A Note on the Propagation of Certain LF Pulses Utilized in a Radio Navigation System; NBS Technical Note 118

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          1. Tables for the Statistical Predication of Radio Ray Bending and Elevation Angle Error Using Surface Values of the Refractive Index; NBS Technical Note 44

            Tables for the Statistical Predication of Radio Ray Bending and Elevation Angle Error Using Surface Values of the Refractive Index; NBS Technical Note 44

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