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A preliminary report on polio in the US during 1957.
The U. S. National Archives and Records Administration at Atlanta, 5780 Jonesboro Road, Morrow, GA 30260 www.archives.gov/atlanta
“POLIOMYELITIS SURVEILLANCE REPORT,” The Global Health Chronicles, accessed February 24, 2020, https://globalhealthchronicles.org/items/show/6256.