Conference Proceedings and Papers -- "Proceedings of the Rocky Mountain Coal Mining Institute", 1934

Conference Proceedings and Papers -- "Proceedings of the Rocky Mountain Coal Mining Institute", 1934, Box: 4. J.J. Rutledge Technical Writings on Coal Mining, A&M 3312. West Virginia and Regional History Center. https://archives.lib.wvu.edu/repositories/2/archival_objects/164345 Accessed February 02, 2026.