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Downs, Winfield Scott, ed. (1960). "William P. Yoerg". Encyclopedia of American Biography. Vol. XXX. New York: American Historical Society. p. 252. OCLC4366867.
"August 1st, 1936". Franklin D. Roosevelt, Day by Day. The Pare Lorentz Center at the FDR Presidential Library. 2011. Archived from the original on December 6, 2019.
web.archive.org
"August 1st, 1936". Franklin D. Roosevelt, Day by Day. The Pare Lorentz Center at the FDR Presidential Library. 2011. Archived from the original on December 6, 2019.
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Downs, Winfield Scott, ed. (1960). "William P. Yoerg". Encyclopedia of American Biography. Vol. XXX. New York: American Historical Society. p. 252. OCLC4366867.