Series Has Been Subdivided Into Two Variables: (1)-- Original Data, 1890-1916; (2)--Original Data, 1913-1941. Quotations Given For Monday Of Each Week By"Chicago Dairy Product." Source: Bls Bulletin No. 334, Pp. 206-207
This NBER data series m04028b appears on the NBER website in Chapter 4 at http://www.nber.org/databases/macrohistory/contents/chapter04.html.
NBER Indicator: m04028b
Release: NBER Macrohistory Database
National Bureau of Economic Research, Wholesale Price of Creamery Butter for Chicago, IL [M0428BUS16980M267NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M0428BUS16980M267NNBR/, June 30, 2015.