U.S. Dept. of Health, Education, and Welfare, Social Security Administration, Office of Research and Statistics
1969-
Research report / U.S. Department of Health and Human Services, Social Security Administration, Office of Policy, Office of Research, Statistics, and International Policy
no. 31, 40, 44, 48, 50, 54, 58, 59, 60, 61, 62, 63, 64, 65
1969 , 1971 , 1973 , 1975 , 1977 , 1979 , 1981 , 1983 , 1985 , 1987 , 1989 , 1991 , 1993 , 1995 , 1997
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