Series Is Presented Here As Four Variables--(1)--Original Data, 1911-1919 (2)--Original Data, 1919-1944 (3)--Original Data, 1945-1957 (6)--Original Data, 1956-1959. Source: Survey Of Current Business, Monthly Issues
This NBER data series m06003ad appears on the NBER website in Chapter 6 at http://www.nber.org/databases/macrohistory/contents/chapter06.html.
NBER Indicator: m06003ad
Release: NBER Macrohistory Database
National Bureau of Economic Research, Total Sales, Catalog and Store, Two Mail Order Houses for United States [M063ADUSM144NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M063ADUSM144NNBR/, July 6, 2015.