Roy, A. (1907). A history of the coal miners of the United States: From the development of the mines to the close of the anthracite strike of 1902, including a brief sketch of early British miners (3rd ed., rev. and enl.). Columbus, O.: Press of J.L. Trauger Printing Co..

Roy, Andrew. A History of the Coal Miners of the United States: From the Development of the Mines to the Close of the Anthracite Strike of 1902, Including a Brief Sketch of Early British Miners. 3rd ed., rev. and enl. Columbus, O.: Press of J.L. Trauger Printing Co., 1907.

Roy, Andrew. A History of the Coal Miners of the United States: From the Development of the Mines to the Close of the Anthracite Strike of 1902, Including a Brief Sketch of Early British Miners. 3rd ed., rev. and enl. Columbus, O.: Press of J.L. Trauger Printing Co., 1907.