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- [2] STATE OF TRACE-ELEMENTS OF COAL DURING GASIFICATION ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 1973, (AUG26): : 38 - 38
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- [7] Trace elements in coal and release of trace elements during pyrolysis. ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 2003, 225 : U869 - U869
- [8] REMOVAL OF TRACE-ELEMENTS DURING CHEMICAL CLEANING OF COAL ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 1985, 189 (APR-): : 54 - FUEL