Source: Data For 1917-1919: Direct From Department Of Commerce. Data For 1920-1953: Survey Of Current Business.
This NBER data series m01060 appears on the NBER website in Chapter 1 at http://www.nber.org/databases/macrohistory/contents/chapter01.html.
NBER Indicator: m01060
Release: NBER Macrohistory Database
National Bureau of Economic Research, Corn Grindings for United States [M01060USM391NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M01060USM391NNBR/, August 31, 2015.