Britannica Educational Publishing 
American Indians of the Plateau and Plains [PDF ebook] 

The use of horses has perhaps most dramatically shaped the way of life for Native American tribes in the Plateau and Plains regions of North America, but the practices and traditions of both culture areas date back to a time long before Europeans ever touched American shores, introducing their animals and customs to the continent’s indigenous peoples. This captivating volume examines the history and cross-cultural interactions that came to be associated with the peoples of the Plateau and the changing settlement patterns of the Plains peoples, as well as the cultural, social, and spiritual practices that have defined the major tribes of each region.