National Center for Health Services Research and Health Care Technology Assessment, Public Health Service, U.S. Dept. of Health and Human Services[1989]DHHS publication
no. (PHS) 89-3449
prepared by Alma McMillan, Penelope L. Pine, Marilyn Newton
Dept. of Health and Human Services, Health Care Financing Administration, Office of Research and Demonstration[1983]Health care financing program statistics
no. (HCFA) 03151 , DHHS publication
U.S. Dept. of Health and Human Services, Social Security Administration, Office of Policy, Office Research and Statistics : For sale by the Supt. of Docs., U.S. G.P.O.c1980DHHS publication
no. (SSA) 13-11811. Research report ; 55