Committee on the History of the Federal Reserve System (U.S.). Business Cycle Analysis: Theoretical Contributions : Main Theorists on Business Fluctuation (Innovators) Since 1910: Cassel, Entry 176, Box 22, Folder 8, Item 6,
Committee on the History of the Federal Reserve System.
https://fraser.stlouisfed.org/archival/1342/item/459170, accessed on April 22, 2026.