Prices Are Based On A Pound Of Dough Before Baking. 1913-15 Data Are First Of Month Prices; 1916-42 Data Are From The 15Th Of Each Month Or The Tuesday Nearest The 15Th. Source: Bls Bulletins And Monthly Issues Of "Wholesale Prices"
This NBER data series m04021 appears on the NBER website in Chapter 4 at http://www.nber.org/databases/macrohistory/contents/chapter04.html.
NBER Indicator: m04021
Release: NBER Macrohistory Database
National Bureau of Economic Research, Wholesale Price of Bread for New York, NY [M04021US35620M267NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M04021US35620M267NNBR/, November 28, 2015.