Widnall, William B. (William Beck), 1906-1983. Letter to Mr. M. S. Eccles, Box 61, Folder 2, Item 20, Marriner S. Eccles Papers. https://fraser.stlouisfed.org/scribd/?item_id=460949&filepath=/files/docs/historical/eccles/061_02_0020.pdf, accessed on February 19, 2018.
- Banks and banking
- Board of Governors of the Federal Reserve System (U.S.), 1935-
- Federal Reserve Board, 1914-1935