Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "National Summary of Business Conditions," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "November 1970," Federal Reserve Bulletin (November 1970) : 70-71. https://fraser.stlouisfed.org/title/62/item/21431/toc/330823 , accessed on April 18, 2024.