Webb, Robert H. ; Boyer, Diane E <br/><br/>
Damming Grand Canyon  The 1923 USGS Colorado River Expedition 

 -  University Press of Colorado  2007 
<br/><br/><label>ISBN: </label>978-0-87421-660-8 
<br/><br/><label>Subjects--Topical Terms: </label><br/>HistoryHISTORY / General;HISTORY / United States / 20th Century;HISTORY / United States / State & Local / Southwest (AZ, NM, OK, TX)