John Wesley Powell's exploration of the Colorado River
By: [Compiled from information provided by Mary C. Rabbitt]
Series: Its USGS: INF-74-19
Publisher: for sale by the Supt. of Docs., U.S. Govt. Print. Off.
Published: 1974
Place of publication: Washington
Language: eng
Number of pages: 28
Subjects: Discovery and exploration; Discoveries in geography; American