Two pamphlets by Robert C. Sutro for the Mortgage Bankers Association of America: MORTGAGES AND REAL ESTATE INVESTMENTS: HIGH YIELD PERFORMERS FOR TRUSTEED FUNDS, and MORTGAGES FOR RETIREMENT AND ENDOWMENT FUNDS, 1966. Also, article by Sutro: "Mortgages Provide Higher Yields for Trusteed Funds," COMMERCIAL AND FINANCIAL CHRONICLE, October 1964.