1. Armitage P (1976) National health survey systems in the European Community. Int J Epidemiol 5:321–326
2. Bergner M, Bobbitt RA, Kressel S, Pollard WE, Gilson BS, Morris JR (1976) The sickness impact profile. Int J Health Ser 6:393–415
3. Ford Foundation Seminar on the Delivery of Urban Health Services, Position Papers No 4;WR Curtis,1974
4. Data Collection and Analysis Under P. L. 93–641 (1976) Department of Health, Education and Welfare, Public Health Service, National Center for Health Statistics. Data Work Program: U.S. Government Printing Office, Washington, D.C.: No. (HRA) 76–637
5. Dettman DA, Peters JA (1977) A foundation for health care regulation: P. L. 91–6703 and P. L. 93–641. Inquiry 14:32–42