* Richard White,"The Roots of Dependency: Subsistence, Environment, and Social Change among the Choctaws, Pawnees, and Navajos" (Lincoln: University of Nebraska Press, 1983).
* Richard White,"The Roots of Dependency: Subsistence, Environment, and Social Change among the Choctaws, Pawnees, and Navajos" (Lincoln: University of Nebraska Press, 1983).