Down the great unknown
Subtitle: John Wesley Powell's 1869 journey of discovery and tragedy through the Grand Canyon
By: Edward Dolnick.
Publisher: HarperCollins
Published: 2002
Place of publication: London
Language: eng
Number of pages: 452
Subjects: Powell, J. W. -- 1834-1902 -- Journeys -- Arizona -- Grand Canyon.; Grand Canyon (Ariz.) -- Description and travel.; Grand Canyon (Ariz.) -- Discovery and exploration.
Notes: Includes bibliography: p423-439. - and index.