The exploration of the Colorado River and its canyons

Subjects

• Powell, John Wesley, 1834-1902 -- Travel -- Colorado River (Colo.-Mexico)
• Canyons -- Colorado River (Colo.-Mexico) -- History -- 19th century.
• Colorado River (Colo.-Mexico) -- Description and travel.
• Colorado River (Colo.-Mexico) -- Discovery and exploration.
• Southwest, New -- Description and travel.
• Southwest, New -- Discovery and exploration.