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The Grand Canyon Expedition: The Exploration of the Colorado River and Its Canyons: Powell, John Wesley: 9781423651666: Amazon.com: Books
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Damming Grand Canyon: The 1923 USGS Colorado River Expedition: Boyer, Diane E, Webb, Robert H.: 9780874216608: Amazon.com: Books
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The One-Armed Geologist Whose Daring Colorado River Descent Made the Grand Canyon Famous | Essay | Zócalo Public Square
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