"Self-Contained Mine Rescue Oxygen Breathing Apparatus: A Handbook for Miners" by the United States Department of Commerce, Bureau of Mines, 1923

"Self-Contained Mine Rescue Oxygen Breathing Apparatus: A Handbook for Miners" by the United States Department of Commerce, Bureau of Mines, 1923, Box: 64a, Folder: 28. J. Davitt McAteer Papers regarding Mining Safety, A&M 4219. West Virginia and Regional History Center. https://archives.lib.wvu.edu/repositories/2/archival_objects/112499 Accessed December 05, 2025.