Series Is Presented Here As Two Variables--(1)--Seasonally Adjusted Data, 1939-1948 (2)--Seasonally Adjusted, 1948-1969. Source: Computed By NBER From Seasonally Adjusted Components--Series 05123 (Total Manufacturing And Trade Inventories) Divided By Series 06102 (Total Manufacturing And Trade Sales)
This NBER data series m05116a appears on the NBER website in Chapter 5 at http://www.nber.org/databases/macrohistory/contents/chapter05.html.
NBER Indicator: m05116a
Release: NBER Macrohistory Database
National Bureau of Economic Research, Ratio of Inventories To Sales, Manufacturing and Trade, Total for United States [M0516AUSM163SNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M0516AUSM163SNBR/, September 3, 2015.