United States Department of Health, Education, and Welfare, & United States. Social Security Administration. Office of Research and Statistics. (1967). Social security programs throughout the world: 1967. U.S. Department of Health, Education, and Welfare, Social Security Administration Office of Research and Statistics.

United States Department of Health, Education, and Welfare, and United States. Social Security Administration. Office of Research and Statistics. Social Security Programs Throughout the World: 1967. Washington D.C.: U.S. Department of Health, Education, and Welfare, Social Security Administration Office of Research and Statistics, 1967.

United States Department of Health, Education, and Welfare, and United States. Social Security Administration. Office of Research and Statistics. Social Security Programs Throughout the World: 1967. U.S. Department of Health, Education, and Welfare, Social Security Administration Office of Research and Statistics, 1967.