Source: Federal Reserve Bank Of New York, Domestic Research Division
This NBER data series m06003a appears on the NBER website in Chapter 6 at http://www.nber.org/databases/macrohistory/contents/chapter06.html.
NBER Indicator: m06003a
Release: NBER Macrohistory Database
National Bureau of Economic Research, Index of Mail Order House Sales, Adjusted For Trend and Price Change for United States [M06F3AUSM516SNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M06F3AUSM516SNBR/, September 4, 2015.