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ORO 81-392 Researching Trace Elements in Liquefied Coal

Circa 1980-1983. (Pre-1983). Advaned Coal Science and Technology pamphlet caption: Recent PETC research has determined the trace elements which are present when coal is liquefied; further research will determine the fate of such elements during coal conversion process.

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Uploaded on April 3, 2013
Taken on March 9, 2007