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The cost and availability of Colombian coal
Jamieson, Eric D. - 1985
Persistent link: https://www.econbiz.de/10000706868
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The availability and cost of coal in South Africa
Long, Ray - 1986
Persistent link: https://www.econbiz.de/10000706875
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The Availability and cost of coal in South Africa
Long, R. - 1986
Persistent link: https://www.econbiz.de/10000018544
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Coal in Hungary
Benson, Sarah - 1999
Persistent link: https://www.econbiz.de/10001422936