The Figure For October 1931 Is Interpolated Because No Data Was Reported For This Month. Beginning In 1936, Data Were Reported Through The Third Of The Month And Are Included In The Preceding Month. Data For May, July, And October 1940 And January And April 1941 Are For Five Weeks; Other Months Are Four Weeks. Joplin Is A Tri-State District Covering Parts Of Kansas, Missouri And Oklahoma.Area Covered Is U.S.-- Joplin District. Source: U.S. Department Of Commerce: Survey Of Current Business, Supplements Of 1932, 1936, 1938, 1940 And Following Issues.
This NBER data series m05089 appears on the NBER website in Chapter 5 at http://www.nber.org/databases/macrohistory/contents/chapter05.html.
NBER Indicator: m05089
Release: NBER Macrohistory Database
National Bureau of Economic Research, Zinc Ore Stocks, Joplin District for Joplin, MO [M05089US27900M601NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M05089US27900M601NNBR/, October 10, 2015.