Political and commercial geology, edited by J. E. Spurr, McGraw-Hill Book Co., New York, 1920.
Strategy of minerals, edited by George Otis Smith, D. Appleton and Co., New York, 1919.
Coal, iron and war, by E. C. Eckel, Henry Holt and Company, New York, 1920.
The iron and associated industries of Lorraine, the Sarre district, Luxemburg, and Belgium, by Alfred H. Brooks and Morris F. LaCroix, Bull. 703 U. S. Geological Survey, 1920.
The Lorraine iron field and the war, by Alfred H. Brooks, Eng. and Min. Journ., vol. 109, 1920, pp. 1065-1069.
Munitions Resources Commission of Canada, final report, 1920.
FOOTNOTES:
[58] Umpleby, Joseph B., Strategy of minerals—The position of the United States among the nations: D. Appleton and Co., New York, 1919, p. 286.
[59] Control is here used in a very general sense to cover activities ranging from regulation to management and ownership. The context will indicate in most cases that the word is used in the sense of regulation when referring to governmental relationships.