| − | <ref>Washburn, Wilcomb E. 1998. ''Handbook Of North American Indians, Vol. 4, History of Indian-White Relations.'' Washington: Smithsonian Institute.</ref>
| + | Washburn, Wilcomb E. 1998. ''Handbook Of North American Indians, Vol. 4, History of Indian-White Relations.'' Washington: Smithsonian Institute. |