Data Represent About One-Third Of Crude Potash. Given In The Source As"Potasse" With The Chemical Notation "K2O". Data For August 1936, 1937, And 1938 Reflect Cumpulsory Vacation Time. Source: Bulletin De La Statistique Generale, Vol. 14, October 1924, P. 102 And Succeeding Issues.
This NBER data series m01187 appears on the NBER website in Chapter 1 at http://www.nber.org/databases/macrohistory/contents/chapter01.html.
NBER Indicator: m01187
Release: NBER Macrohistory Database
National Bureau of Economic Research, Potash Production (Recovered From Crude Potash Mined) for France [M01187FRM580NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M01187FRM580NNBR/, September 5, 2015.