Source: U.S. Bureau Of The Census, Business Cycle Developments, October 1967 And March 1968
This NBER data series q15034 appears on the NBER website in Chapter 15 at http://www.nber.org/databases/macrohistory/contents/chapter15.html.
NBER Indicator: q15034
Release: NBER Macrohistory Database
National Bureau of Economic Research, Federal Cash Surplus Or Deficit for United States [Q15034USQ027SNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/Q15034USQ027SNBR/, August 31, 2015.