Series Is Presented Here As Three Variiables -- (1)--Original Data, 1890-1923 (2)--Original Data, 1920-1940 (3)-- Original Data, 1940-1944. Prices Are For White, Plain, No. 1 Common, 4/4, Rough, R.W., Loose, Carlot Or Mixed Car, F.O.B. Mill. Source: Bls Bulletins. From July, 1943, On Data Taken From Bls "Average Wholesale Prices And Index Numbers Of Individual Commodities" (Mimeographed Release, Monthly).
This NBER data series m04089c appears on the NBER website in Chapter 4 at http://www.nber.org/databases/macrohistory/contents/chapter04.html.
NBER Indicator: m04089c
Release: NBER Macrohistory Database
National Bureau of Economic Research, Wholesale Price of Oak, White Plain for United States [M0489CUSM276NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M0489CUSM276NNBR/, July 29, 2015.