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Coal
Harris, D. J. - 1980
Persistent link: https://www.econbiz.de/10000094655
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Coal mining on Spitsbergen
Brugmans, Peter Johannes - 1987
Persistent link: https://www.econbiz.de/10003503584
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Coal
Grenfell, D. R. - 1947
Persistent link: https://www.econbiz.de/10002272998
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Coal mines
International Labour Office - 1938
Persistent link: https://www.econbiz.de/10003143634
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Coal
Broderick, Grace N. (contributor) - United States / Bureau of Mines - 1969
Persistent link: https://www.econbiz.de/10003251794
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Coal mining ; 1
Jones, Donald Campbell (contributor);  … - Pennsylvania State College / Mineral Industries … - 1950 - 3. ed
Persistent link: https://www.econbiz.de/10003169462
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Coal mining ; 2
Jones, Donald Campbell (contributor);  … - Pennsylvania State College / Mineral Industries … - 1952 - 3d ed
Persistent link: https://www.econbiz.de/10003169466
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Coal mining ; 3
Jones, Donald Campbell (contributor);  … - Pennsylvania State College / Mineral Industries … - 1954 - 3d ed
Persistent link: https://www.econbiz.de/10003169469
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Coal mining
Jones, Donald Campbell (contributor);  … - Pennsylvania State College / Mineral Industries … - 1949 - 3d ed
Persistent link: https://www.econbiz.de/10002850520
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Coal
Court, W. H. B. - 1951
Persistent link: https://www.econbiz.de/10001569925