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![](./img/clear.gif) 1.- Coal: Classification, coalification, mineralogy, trace-element chemistry and oil and gas potential
Lyons, P.C., ed.; Alpern,B.~ed
Amsterdam: Elsevier, 1989
Geología
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![](./img/clear.gif) 2.- Peat and coal: origin, facies and depositional models
Lyons, P.C., ed.; Alpern,B.~ed
Amsterdam: Elsevier, 1989
Geología
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