Statewide coverage of 1950 American Indian Reservations. Boundaries that cross into the adjacent states are included. Population data is from the Annual Report of the Commissioner of Indian Affairs; Bureau of the Census Report 1950, revised by Bureau of Indian Affairs; Bureau of Indian Affairs, Phoenix Area Office "Withdrawal Program Summaries" ending Dec. 31, 1955; and Tohono, Gila Bend and San Xavier from estimate by Papago Indian Agency (11/23/56).