Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Postal Savings System," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "March 1940," Federal Reserve Bulletin (March 1940) : 54-54. https://fraser.stlouisfed.org/title/62/item/21023/toc/383790 , accessed on March 28, 2024.