Delaware, Lackawanna, and Western Railroad Company Coal Mining Department correspondence regarding safety and production tests, 1909–1911

Delaware, Lackawanna, and Western Railroad Company Coal Mining Department correspondence regarding safety and production tests, 1909–1911, Box: 50, Folder: 20. 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/112065 Accessed November 23, 2024.