Title Proceedings of the fifteenth consecutive and first biennial convention ; April 27 to May 5, 1914, held at Pittsburg, Kansas ; together with the evidence in the case of Prairie Creek Coal Mining Company, Mammoth Vein Coal Company, Kali-Inla Coal Company and Coronado Coal Company vs. Charles S. Keith ; also the report of ex-president Alex Howat / District no. 14, United Mine Workers of America.