Figures Here Are The Average Of Weekly Quotations. Source: Bls Bulletins And "Wholesale Prices".
This NBER data series m04147 appears on the NBER website in Chapter 4 at http://www.nber.org/databases/macrohistory/contents/chapter04.html.
NBER Indicator: m04147
Release: NBER Macrohistory Database
National Bureau of Economic Research, Wholesale Price of Wire, Fence, Barb, Galvanized for Chicago, IL [M04147US16980M287NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M04147US16980M287NNBR/, June 30, 2015.