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Katrina Manson
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Bradt Sierra Leone
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published
2009
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3 editions
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Sierra Leone
by
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published
2013
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2 editions
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Sierra Leone
by
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published
2012
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2 editions
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Burkina Faso
by
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published
2012
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Bradt Burkina Faso
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published
2006
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2 editions
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Sierra Leone
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“NGA kept track of all movement at 49,000 airfields around the world. Whitworth even wanted to put GPS, or a similar navigation system, on the moon. And if GPS got jammed or hacked, he wanted other ways to map space too. NGA was fashioning digital maps drawing on magnetics, gravity, remote sensing, celestial navigation, and elevation. "From seabed to space”
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