Series Is Presented Here As Two Variables--(1)--Seasonally Adjusted Data, 1919-1946 (2)--Original Data, 1919-1963. Data Represent Averages Per Trading Day. Source: Federal Reserve Board, Data For 1919-1938: "Revised Index Of Department Store Sales", Federal Reserve Bulletin, June 1944; Data For 1939-1946: "Department Store Sales, U.S.", Mimeo Release, Research And Statistics 1344, Corrected As Of May 1947, Furnished By Frb.
This NBER data series m06002a appears on the NBER website in Chapter 6 at http://www.nber.org/databases/macrohistory/contents/chapter06.html.
NBER Indicator: m06002a
Release: NBER Macrohistory Database
National Bureau of Economic Research, Index of Department Store Sales for United States [M06F2AUSM343SNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M06F2AUSM343SNBR, February 13, 2016.