Board of Governors of the Federal Reserve System (U.S.), 1935-. "Detailed Debit and Credit Balances at Brokers Carrying Margin Accounts," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "1973-1977," Annual Statistical Digest (December 1978) : 351-351. https://fraser.stlouisfed.org/title/7/item/23504/toc/110198 , accessed on May 11, 2024.