Series Is Presented Here As Two Variables--(1)--Original Data, 1919-1944 (2)--Original Data, 1941-1967. Data Were Computed By The Average Of Daily Figures. Data Include Yields In The Partially Tax Exempt Catagory; Data For 1919-1925 Are Callable After Eight Years; Data For 1926-1944, After Twelve Years. Data For 1919-October 15, 1925 Also Include Certain Liberty Loan Issues. Source: Federal Reserve Bulletin, December 1938, P. 1045 And Following Monthly Issues Through March 1944 (Checked With U.S. Department Of Commerce, Survey Of Current Business, March 1939, P. 18, And Following Issues).
This NBER data series m13033a appears on the NBER website in Chapter 13 at http://www.nber.org/databases/macrohistory/contents/chapter13.html.
NBER Indicator: m13033a
Release: NBER Macrohistory Database
National Bureau of Economic Research, Yield On Long-Term United States Bonds for United States [M1333AUSM156NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M1333AUSM156NNBR/, July 7, 2015.