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World coal : economics, policies and prospects
Gordon, Richard L. - 1987
Persistent link: https://www.econbiz.de/10000720946
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World coal : economics, policies and prospects
Gordon, Richard L. - 2010
Persistent link: https://www.econbiz.de/10008648442
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Prospects of US coal
Gordon, Richard L. - In: Energy policy 9 (1981) 4, pp. 279-288
Persistent link: https://www.econbiz.de/10002466829