Damming Grand Canyon : the 1923 USGS Colorado River expedition / Diane E. Boyer and Robert H. Webb ; U.S. Geological Survey ; foreword by Michael Collier.
In 1923, America paid close attention, via special radio broadcasts, newspaper headlines, and cover stories in popular magazines, as a government party descended the Colorado to survey Grand Canyon. Fifty years after John Wesley Powell's journey, the canyon still had an aura of mystery and extr...
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