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(9) Hanford, Benjamin. The Labor War in Colorado. New York, 1904.
(10) Rastall, B. M. The Labor History of the Cripple Creek District. A study in industrial evolution. Madison, Wis., 1908.
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(12) Wright, Arnold. Disturbed Dublin. The story of the great strike of 1913-14, with a description of the industries of the Irish Capital. London, 1914.
(13) Seattle General Strike Committee. The Seattle General Strike. An account of what happened in the Seattle labor movement, during the general strike, February 6-11, 1919. Seattle, 1919.
(14) Interchurch World Movement. Report on the Steel Strike of 1919. New York, 1920.
(15) U.S. Bureau of Labor Statistics. Report in Regard to the Strike of Mine Workers in the Michigan Copper District. Bulletin No. 139. February 7, 1914.
(16) ——. Strikes and Lockouts, 1881-1905. Twenty-first annual report, 1906.