Series Is Presented Here As Two Variables--(1)-- Original Data, 1935-1949 (2)--Original Data, 1946-1968. Figures Are Monthly Averages Of Daily Quotations. Source: Bls, "Spot Market Prices, " Summary Ls 44-2297, 1935-February, 1948, And "Daily Index Numbers And Spot Primary Market Prices For 28 Commodities" (Mimeographed) Thereafter.
This NBER data series m04201a appears on the NBER website in Chapter 4 at http://www.nber.org/databases/macrohistory/contents/chapter04.html.
NBER Indicator: m04201a
Release: NBER Macrohistory Database
National Bureau of Economic Research, Index of Spot Market Prices of 16 Raw Industrial Commodities for United States [M0401AUSM234NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M0401AUSM234NNBR/, October 4, 2015.