Publications -- instructions for breathing apparatus, 1962, Box: 3. Lonnie Miller, Compiler, Research Papers Regarding Coal History in Southwestern Pennsylvania, A&M 4078. West Virginia and Regional History Center.
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Publications -- instructions for breathing apparatus, 1962, Box: 3. Lonnie Miller, Compiler, Research Papers Regarding Coal History in Southwestern Pennsylvania, A&M 4078. West Virginia and Regional History Center. https://archives.lib.wvu.edu/repositories/2/archival_objects/145067 Accessed January 16, 2026.