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181“...U.S. Department of the Interior, U.S. Geological Survey,...”
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182by Webb, Robert H.“...U.S. Department of the Interior, U.S. Geological Survey,...”
Published 1999
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183Published 1999“...U.S. Department of the Interior, U.S. Geological Survey,...”
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184by Gregory, Herbert E. (Herbert Ernest), 1869-1952“...U.S. Department of the Interior, U.S. Geological Survey,...”
Published 1916
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185by Hazel, Joseph E. (Joseph Ernest), 1962-“...U.S. Department of the Interior, U.S. Geological Survey,...”
Published 2010
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186Geomorphology and vegetation change at Colorado River campsites, Marble and Grand Canyons, Arizona /by Hadley, Daniel R.“...U.S. Department of the Interior, U.S. Geological Survey,...”
Published 2018
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187by Griffiths, Ronald E.“...U.S. Department of the Interior, U.S. Geological Survey,...”
Published 2014
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188by Anderson, T. W. (Thomas Warren), 1940-“...U.S. Department of the Interior, U.S. Geological Survey,...”
Published 1995
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189by Carr, Wilfred James, 1926-“...U.S. Department of the Interior, U.S. Geological Survey,...”
Published 1991
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190“...U.S. Department of the Interior, U.S. Geological Survey,...”
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191by Fuis, Gary S.“...U.S. Department of the Interior, U.S. Geological Survey,...”
Published 1996
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192by Beisner, Kimberly R.“...U.S. Department of the Interior, U.S. Geological Survey,...”
Published 2017
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193by Paretti, Nicholas V.“...U.S. Department of the Interior, U.S. Geological Survey,...”
Published 2017
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194by Love, Jeffrey J.“...U.S. Department of the Interior, U.S. Geological Survey,...”
Published 2017
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195“...U.S. Department of the Interior, U.S. Geological Survey,...”
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196“...U.S. Department of the Interior, U.S. Geological Survey,...”
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197“...U.S. Department of the Interior, U. S. Geological Survey,...”
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198by Truini, Margot“...U.S. Department of the Interior, U.S. Geological Survey,...”
Published 2013
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199by Culver, Melanie“...U.S. Department of the Interior, U.S. Geological Survey,...”
Published 2013
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200by Billingsley, George H.“...U.S. Department of the Interior, U.S. Geological Survey,...”
Published 1994
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