The 1923 USGS Colorado River Expedition Boyer, Diane E;Webb, Robert H. creator text xx University Press of Colorado 2007 9999 monographic und

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Boyer, Diane E;Webb, Robert H. Grand Canyon (Ariz.) -- Description and travel; Colorado River (Colo.-Mexico) -- Description and travel; Geological Survey (U.S.) -- History -- 20th century; Geological Survey (U.S.) -- Biography; River surveys -- Colorado River (Colo.-Mexico) -- History History 9780874216608 www.jstor.org/stable/10.2307/j.ctt4cgqhx www.jstor.org/stable/10.2307/j.ctt4cgqhx 171212