Series Is Presented Here As Two Variables--(1)--Seasonally Adjusted Data, 1919-1929 (2)--Seasonally Adjusted Data, 1927-1950. Source: For 1927-1940, NBER Occasional Paper No. 12, Frederick C. Mills, "Prices In The War Economy" (Figures Were Converted To The 1947-1949=100 Base); For 1941-1950, Wage And Salary Cost Per Unit Of Output.
This NBER data series m09106b appears on the NBER website in Chapter 9 at http://www.nber.org/databases/macrohistory/contents/chapter09.html.
NBER Indicator: m09106b
Release: NBER Macrohistory Database
National Bureau of Economic Research, Index of Ratio: Wholesale Prices of Manufactured Goods To Production Worker Wage Cost Per Unit of Output for United States [M0906BUSM349SNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M0906BUSM349SNBR/, July 29, 2015.