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Understanding How Thompson Navigated

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Link Title: Understanding How Thompson Navigated Open in a new window
Link URL: http://www.northwestjournal.ca/dtnav.html
Link Details: About David Thompson's exploration of western Canada and the northwestern United States from 1790 to 1812, using a sextant and compass. From the Northwest Journal.
Category: Top : Science : Earth_Sciences : Geomatics : Navigation : History
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Understanding How Thompson Navigated