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The coal resources of the world ; Vol. 1
McInnes, William (contributor); Dowling, D. B. (contributor) - 1913
Persistent link: https://www.econbiz.de/10000378030
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Coal Fields of Manitoba, Saskatchewan, Alberta
Dowling, D. B. - 1914 - Rev. ed.
Persistent link: https://www.econbiz.de/10000379873
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The coal resources of the world ; Vol. 2
McInnes, William (contributor); Dowling, D. B. (contributor) - 1913
Persistent link: https://www.econbiz.de/10000663186
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The coal resources of the world ; Vol. 3
McInnes, William (contributor); Dowling, D. B. (contributor) - 1913
Persistent link: https://www.econbiz.de/10000663188
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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