Source: Bls, Mimeographed Release (Undated), "Consumer Price Index For Urban Wage Earners And Clerical Workers. U.S. City Average: Nondurable Commodities Less Food, Series L-1, " 1935-1966; Current Data In Monthly "Consumer Price Index." Also In"Economic Indicators" (C.E.A.) This NBER data series m04185 appears on the NBER website in Chapter 4 at http://www.nber.org/databases/macrohistory/contents/chapter04.html. NBER Indicator: m04185