Damming Grand Canyon : The 1923 USGS Colorado River Expedition
Boyer Diane E Boyer
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The Changing Mile Revisited : An Ecological Study of Vegetation Change with Time in the Lower Mile of an Arid and Semiarid Region
Turner Raymond M. Turner
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Grand Canyon, A Century of Change : Rephotography of the 1889-1890 Stanton Expedition
Webb Robert H. Webb
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Requiem for the Santa Cruz : An Environmental History of an Arizona River
Webb Robert H. Webb
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Floods, Droughts, and Climate Change
Collier Michael Collier
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