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    Damming Grand Canyon the 1923 USGS Colorado River expedition / by Boyer, Diane E.

    Published 2007
    An electronic book accessible through the World Wide Web; click to view
    Electronic eBook

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  2. 2
    Cover Image

    Damming Grand Canyon : The 1923 USGS Colorado River Expedition / by Boyer, Diane E.

    Published 2007
    Full text available:
    Electronic eBook

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