Series Is Presented Here As Two Varibles--(1)--Original Data, 1938-1955 (2)--Original Data, 1948-1969. Source: Derived By Adding Series (Total Manufacturers' Inventories), (Retail Trade Inventories, All Stores), And (Wholesale Inventories, Total Trade); See These Series For Sources.
This NBER data series m05123b appears on the NBER website in Chapter 5 at http://www.nber.org/databases/macrohistory/contents/chapter05.html.
NBER Indicator: m05123b
Release: NBER Macrohistory Database
National Bureau of Economic Research, Manufacturing and Trade Inventories, Total for United States [M0523BUSM244NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M0523BUSM244NNBR, February 11, 2016.