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United States Public Health Service list of official orders, April 6 to April 15, 1941.
The U. S. National Archives and Records Administration at Atlanta, 5780 Jonesboro Road, Morrow, GA 30260, www.archives.gov/atlanta
“USPHS ORDERS,” The Global Health Chronicles, accessed September 28, 2021, https://globalhealthchronicles.org/items/show/5284.