• 1 Discovery and exploration
• 1 Geographical Surveys West of the 100th Meridian (U.S.)
• 1 Scientific expeditions
• 1 Weathering

• 2 Geographical Surveys West of the 100th Meridian (U.S.)
• 2 Wheeler, George M. (George Montague), 1842-1905
• 1 Bell, William
• 1 Bell, William, 1830-1910
• 1 United States. Army. Corps of Engineers
• 1 United States. War Department. Corps of Engineers

• 2 English

• 1 Arizona
• 1 Colorado River (Colo.-Mexico)
• 1 Grand Canyon (Ariz.)
• 1 United States

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