Hamlin, Charles S. (Charles Sumner), 1861-1938. "Index-Digest of Charles S. Hamlin Diaries, Box 33, Volume 19, Reel 19, April 1-December 1, 1931" in Diaries of Charles S. Hamlin
(April 1-December 1, 1931).
https://fraser.stlouisfed.org/title/5194/item/533160, accessed on March 6, 2026.