Author/Creator
- United States. Mine Safety and Health Administration4
- National Institute for Occupational Safety and Health3
- United States. Bureau of Labor Statistics, issuing body3
- United States. Employment Standards Administration3
- Statistics Canada. Energy Section2
- United Mine Workers of America2
- United States. Employment Standards Administration. Office of Workers' Compensation Programs2
- Center for Disease Control1
- Commission of the European Communities1
- European Coal and Steel Community. Direction générale problèmes du travail, assainissement, et reconversion1
- European Coal and Steel Community. High Authority1
- Great Britain. Ministry of Fuel and Power. Annual report on safety in mines research1
- Great Britain. Safety in Mines Research Board. Annual report of the Safety in Mines Research Board1
- Illinois Coal Operators Association1
- Illinois State Geological Survey1
- India. Dept. of Mines1
- Industrial Workers of the World. General Defense Committee1
- International Labour Office1
- International Labour Organisation. Coal Mines Committee1
- Nederlands Instituut voor Praeventieve Geneeskunde TNO-Leiden1