United States. Bureau of Mines, United States. Mining Enforcement and Safety Administration, & United States. Mine Safety and Health Administration. (1952). Injury experience in coal mining. US Government Printing Office.
Citace podle Chicago (17th ed.)United States. Bureau of Mines, United States. Mining Enforcement and Safety Administration, a United States. Mine Safety and Health Administration. Injury Experience in Coal Mining. Washington: US Government Printing Office, 1952.
Citace podle MLA (8th ed.)United States. Bureau of Mines, et al. Injury Experience in Coal Mining. US Government Printing Office, 1952.
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