Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Monthly Seasonal Factors for Selected Components of the Monetary Aggregates," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "April 1991," Federal Reserve Bulletin (April 1991) : 53-53. https://fraser.stlouisfed.org/title/62/item/20827/toc/113296 , accessed on June 23, 2024.