1. Kaiser Family Foundation. (2011). Timeline: History of health reform in the US. https://www.kff.org/wp-content/uploads/2011/03/5-02-13-history-of-health-reform.pdf
2. United States Government. (1921). H.R. 12634, A bill to encourage instruction in the hygiene of maternity and infancy, July 1, 1918. Visitthecapitol.gov. https://www.visitthecapitol.gov/artifact/hr-12634-bill-encourage-instruction-hygiene-maternity-and-infancy-july-1-1918
3. The committee on the costs of medical care and the history of health insurance in the United States.;The Einstein Quarterly Journal of Biology and Medicine,2002
4. Social Security Administration. (n.d.). Historical background and development of social security. https://www.ssa.gov/history/briefhistory3.html
5. Harvard University. (2020). Hill-Burton Act. https://perspectivesofchange.hms.harvard.edu/node/23