United States. Congress. Senate. Committee on Banking and Currency, 1913-1970
, Seventy-Second Congress, 1931-1933
and Seventy-Third Congress, 1933-1935. "Hearings on S. Res. 84 and S. Res. 56 and S. Res. 97 : Part 10, Guardian Detroit Union Group, Pages 4587-5056" in Stock Exchange Practices : Hearings Before the Committee on Banking and Currency, United States Senate, (1932-1934)
(January 5 to January 23, 1934).
https://fraser.stlouisfed.org/title/87/item/33966, accessed on April 9, 2025.