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. "May 1964," Federal Reserve Bulletin (May 1964) : 80-80. https://fraser.stlouisfed.org/title/62/item/21353/toc/85198 , accessed on March 28, 2024.