Hamlin, Charles S. (Charles Sumner), 1861-1938. "Index-Digest of Charles S. Hamlin Diaries, Box 32, Volume 18, Reel 19, June 1, 1930-March 29, 1931" in Diaries of Charles S. Hamlin
(June 1, 1930-March 29, 1931).
https://fraser.stlouisfed.org/title/5194/item/533159, accessed on March 12, 2026.