Weeks, J. L. (1986). Trends in fatality rates in bituminous coal mines, 1970-85.
シカゴスタイル引用形Weeks, J L. Trends in Fatality Rates in Bituminous Coal Mines, 1970-85. 1986.
MLA引用形式Weeks, J L. Trends in Fatality Rates in Bituminous Coal Mines, 1970-85. 1986.
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