Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Gross National Product or Expenditure," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "April 1963," Federal Reserve Bulletin (April 1963) : 122-122. https://fraser.stlouisfed.org/title/62/item/21340/toc/378492 , accessed on April 20, 2024.