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  1. 1

    Initial results of the NAVSTAR GPS NTS-2 satellite / by Easton, Roger L.

    Published 1978
    Government Document Book
  2. 2

    The contribution of Navigation Technology Satellites to the global positioning system /

    Published 1979
    Government Document Book
  3. 3

    Prototype design and initial test evaluation of a global-positioning-system time-transfer receiver (GPS TTR) /

    Published 1982
    Government Document Book
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