William C. Sturtevant, General Editor; Raymond J. DeMallie, Volume 13 editor. Describes the prehistory, history, and culture of the aboriginal peoples who lived in the region of tall-grass prairies and short-grass high plains of North America. Note: Preface indicates mistakenly that this is the twelfth volume in a 20 volume set. 2 parts in two books, sold as a set.