Source: Ruth P. Mack, Consumption And Business Fluctuations (NBER), Series 34, P. 269
This NBER data series m06062 appears on the NBER website in Chapter 6 at http://www.nber.org/databases/macrohistory/contents/chapter06.html.
NBER Indicator: m06062
Release: NBER Macrohistory Database
National Bureau of Economic Research, Index of Wholesale Sales of Shoes, Revised for United States [M06062USM331NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M06062USM331NNBR/, September 1, 2015.