Thimons, H. F., & H.H. Fields. (1976). Coal: Current Advances in Mining Techniques. M.S.S.
シカゴスタイル引用形Thimons, H.U. Friadrich, , H.H. Fields. Coal: Current Advances in Mining Techniques. New York: M.S.S, 1976.
MLA引用形式Thimons, H.U. Friadrich, , H.H. Fields. Coal: Current Advances in Mining Techniques. M.S.S, 1976.
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