Stewart, B. E. (2011). No. 9: The 1968 Farmington Mine Disaster. West Virginia University Press.
Lua i Stíl Chicago (17ú heag.)Stewart, Bonnie E. No. 9: The 1968 Farmington Mine Disaster. Morgantown, W. Va.: West Virginia University Press, 2011.
Lua MLA (9ú heag.)Stewart, Bonnie E. No. 9: The 1968 Farmington Mine Disaster. West Virginia University Press, 2011.
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