Further reading
References
- Bruns, Roger A. (1997). John Wesley Powell Explorer of the Grand Canyon. Berkeley Heights: Enslow Publishers, Inc.
- Maynard, Charles W. (2003). John Wesley Powell Soldier Scientist and Explorer. New York: The Rosen Publishing Group Inc; PowerKids Press.
- Ray, Deborah K. (2007). Down the Colorado. John Wesley Powell, the One-Armed Explorer. New York: Frances Foster Books; Farrar, Straus and Giroux.
- Souza, D.M. (2004). John Wesley Powell. Scholastic Inc.
- Porter, Eliot. (1969). John Wesley Powell. Diary of the First Trip Through the Grand Canyon 1869. Promontory Press.