TY - BOOK AU - Johnson,Michael D. ED - E.U.A. Department of Health and Human Services TI - Fast facts & figures about social security 1989 U1 - 368.40973 21 PY - 1989/// CY - Washington PB - SSA. Office of Research and Statistics KW - Seguridad social KW - Estados Unidos KW - 1989 N1 - Income of the aged population - Old-age, survivors and disability insurance program -- Medicare - Medicaid - Supplemental security income - Aid to families with dependent children ER -