Williams SJ, Diehr P, Drucker WL, Richardson WC. Mental health services: utilization by low income enrollees in a prepaid group practice plan and in an independent practice plan. Med Care. 1979 Feb;17(2):139-51.
Williams SJ, Diehr P, Drucker WL, Richardson WC. Mental health services: utilization by low income enrollees in a prepaid group practice plan and in an independent practice plan. Med Care. 1979 Feb;17(2):139-51.