The eighth volume in a 10-volume report on the historical development (1966-1973) of the 8 administrative Area Offices of the Indian Health Service (IHS) Mental Health Programs, this report presents information on the Phoenix Area Office and the Tucson Sub-Area Office. Included in this document are: (1) The Context: Political and Geographic (the Phoenix area as a whole, including states, offices, etc., and regional characteristics); (2) Centralized Development of Mental Health Programs in the Phoenix Area (1967-69 and the first mental health Area Chief and 1969-70 staff increases and program description); (3) 1970-72: Decentralization and the Introduction of Mental Health Technicians (professional staff changes, mental health technicians, excerpt of annual report for 1971, and training activities); (4) 1972-73: Consolidation (annual report, special consultant, and summary of policies and problems); (5) Service Unit Programs (Reno Field Office: Schurz Hospital and Stewart Indian School; Owyhee Service Unit, Duck Valley Reservation; Fort Duchesne, Utah; Hopi; White Mountain and San Carlos Apache; Pima-Maricopa Reservation, Sacaton, Arizona; Colorado River Tribes; and City of Phoenix); (6) Summary (problems and accomplishments); (7) Tucson Sub-Area (description of Papago Reservation, the Office of Research and Development, Desert Willow Training Center, Papago Health System, summary of problems and accomplishments). (JC)