(17) Foster, William Z. The Great Steel Strike and Its Lessons. New York, 1920.
(18) Wolman, Leo. "The Boycott in American Trade Unions," Johns Hopkins University Studies in Historical and Political Science, Vol. XXXIV. Baltimore, 1916.
(19) Laidler, Harry W. Boycotts and the Labor Struggle. Economic and legal aspects. With an introduction by Henry R. Seager. New York and London, 1914.
(20) Hunter, Robert. Violence and the Labour Movement. New York, 1914. [Bibliography.]
4. Lynch Law and Lynching:
(1) Walling, W. E. "The Race War in the North," Independent, LXV (July-Sept. 1908), 529-34.
(2) "The So-Called Race Riot at Springfield," by an Eye Witness. Charities, XX (1908), 709-11.
(3) Seligmann, H. J. "Race War?" New Republic, XX (1919), 48-50. [The Washington race riot.]
(4) Leonard, O. "The East St. Louis Pogrom," Survey, XXXVIII (1917), 331-33.
(5) Sandburg, Carl. The Chicago Race Riots, July, 1919. New York, 1919.