Series Is Presented Here As Three Variables--(1)--Original Data, 1911-1937 (2)--Original Data, 1938-1957 (3)--Seasonally Adjusted, 1911-1940. These Data Were Computed By Business Cycles From End Of Month Data (Two Month Moving Averages Center). The Units Are Barrels Of 376 Pounds Net Or 380 Gross Pounds (See Scb, September 1923, P. 47; The Scb 1932 Annual Supplement And Following.) Source: Data For 1911-1920: U.S. Geological Survey, E.F. Burchard (From Data Of The Portland Cement Association And The U.S. Bureau Of Mines, "The Problem Of Business Forecasting, " Pp. 160-161, By W.M. Persons And Others; Data For 1921-1940: U.S. Department Of Commerce, Survey Of Current Business, September 1923, P. 47, And Annual Supplements Thereafter
This NBER data series m05026c appears on the NBER website in Chapter 5 at http://www.nber.org/databases/macrohistory/contents/chapter05.html.
NBER Indicator: m05026c
Release: NBER Macrohistory Database
National Bureau of Economic Research, Portland Cement Stocks for United States [M0526CUSM386SNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M0526CUSM386SNBR/, August 30, 2015.