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. "June 1964," Federal Reserve Bulletin (June 1964) : 110-110. https://fraser.stlouisfed.org/title/62/item/21354/toc/39125 , accessed on May 9, 2024.