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- United States. Mine Safety and Health Administration37
- National Mine Health and Safety Academy18
- United States16
- United States. Congress. Senate. Committee on Appropriations. Subcommittee on Departments of Labor, Health and Human Services, Education, and Related Agencies14
- United States. Congress. House. Committee on Education and Labor. Subcommittee on Health and Safety12
- United States. Congress. House. Committee on Education and Labor11
- United States. Bureau of Mines7
- Westfield, James6
- United States. Congress. House. Committee on Education and the Workforce. Subcommittee on Workforce Protections, author4
- United States. Congress. Senate. Committee on Health, Education, Labor, and Pensions4
- United States. Mine Safety and Health Administration, issuing body4
- United States. Office of the Administrator, Coal Mine Safety and Health4
- Gleim, E. J. (Ernest J.)3
- Nichols, Marvin W.3
- United States. Congress. House. Committee on Government Operations. Manpower and Housing Subcommittee3
- United States. Congress. Senate. Committee on Appropriations. Subcommittee on Departments of Labor, Health and Human Services, Education, and Related Agencies, author3
- United States. Government Accountability Office3
- Diamond, W. P. (William P.)2
- Fama, Joseph P.2
- Finfinger, Gerald L.2