General Imports Through 1933, Imports For Consumption Thereafter. Source: Survey Of Current Business July, 1951, Pp. 27-28 For 1929 Through 1949 Data; Quarterly Summary Of Foreign Commerce Thereafter. Survey Of Current Business For 1953 Data.
This NBER data series q07050 appears on the NBER website in Chapter 7 at http://www.nber.org/databases/macrohistory/contents/chapter07.html.
NBER Indicator: q07050
Release: NBER Macrohistory Database
National Bureau of Economic Research, Quality Index of Imports For Consumption for United States [Q07050USQ345NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/Q07050USQ345NNBR/, August 2, 2015.