Source: Series 05123 (Total Manufacturing And Trade Inventories) Plus U.S. Bureau Of The Census Series M2-1, "Manufacturers' Shipments, Inventories, And Orders, " Summary Tables In Revised Series 1947-1952 (Supplement 2) And Revisions For 1947-1963 And 1961-1968; Latest Data Are From Monthly Bulletins, Series M3-1
This NBER data series m05130 appears on the NBER website in Chapter 5 at http://www.nber.org/databases/macrohistory/contents/chapter05.html.
NBER Indicator: m05130
Release: NBER Macrohistory Database
National Bureau of Economic Research, Manufacturing and Trade Inventories Plus Manufacturers' Unfilled Orders, Total for United States [M05130USM406SNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M05130USM406SNBR/, August 4, 2015.