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Coal
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In situ coal gasification: a unique means of energy recovery
Transport corridors and regional balance in China: the case of coal trade and logistics
Rohstoffsuche in immer groesseren Tiefen. Technische Neuheiten und Trends im Jahre 1980 (2)
Prognozni zasoby metanu vazaneho na uhelna loziska v Ceske republice a jejich mozne vyuziti