Board of Governors of the Federal Reserve System (U.S.), 1935-. "Real Estate Investment Trusts, Unadjusted Net Flows," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "May 9, 1977," Z.1 Financial Accounts of the United States (1977-05-09) : 32-32. https://fraser.stlouisfed.org/title/93/item/69070/toc/477819 , accessed on December 7, 2023.