Board of Governors of the Federal Reserve System (U.S.), 1935-. "April 3, 1968," G.27 Commercial and Industrial Loans to U.S. Addresses, Excluding Bankers' Acceptances and Commercial Paper, by Industry (April 3, 1968). https://fraser.stlouisfed.org/scribd/?item_id=482114&filepath=/files/docs/releases/g27/h12_19680403.pdf&start_page=1, accessed on October 16, 2017.
Board of Governors of the Federal Reserve System