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"Coal gasification" » "Coal classification" (Expand Search), "Coal justification" (Expand Search), "Coal purification" (Expand Search)
"Coal gasification" » "Coal classification" (Expand Search), "Coal justification" (Expand Search), "Coal purification" (Expand Search)
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1Published 1989Subjects: “...Coal gasification Research United States....”
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4Published 1988Subjects: “...Coal gasification, Underground United States....”
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10Published 1989Subjects: “...Coal gasification Research United States Periodicals....”
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