"Industry Wage Survey: Bituminous Coal Mining, Part I: Underground Mines and Part II: Surface Mines, Bulletin No. 1383" by the Bureau of Labor Statistics, United States Department of Labor, November 1962

"Industry Wage Survey: Bituminous Coal Mining, Part I: Underground Mines and Part II: Surface Mines, Bulletin No. 1383" by the Bureau of Labor Statistics, United States Department of Labor, November 1962, Box: S6/Box 3. United Mine Workers of America, Health and Retirement Funds, Records, A&M 2769. West Virginia and Regional History Center. https://archives.lib.wvu.edu/repositories/2/archival_objects/120235 Accessed January 11, 2025.