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Coal mines and mining
Charbon
1,094
Mines et extraction
1,081
Safety measures
491
Environmental aspects
426
Coal
285
Sécurité
221
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1
由 Puglio, D. G. (Donald G.)
Washington : U.S. Dept. of the Interior, Bureau of Mines, 1979
Washington : U.S. Dept. of the Interior, Bureau of Mines, 1979
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2
由 Adams, W. W. (William Waugh), 1884-1945
Washington, D.C. : U.S. Dept. of the Interior, Bureau of Mines, 1920
Washington, D.C. : U.S. Dept. of the Interior, Bureau of Mines, 1920
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3
4
5
Washington : U.S. Govt. Print. Off., 1955
Rev.
Rev.
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6
由 Laskowski, Tadeusz
Warsaw : Centralny Instytut Informacji Naukowo-Technicznej i Ekonomicznej, 1962
Warsaw : Centralny Instytut Informacji Naukowo-Technicznej i Ekonomicznej, 1962
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7
8
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由 Skema, Viktoras W.
Harrisburg, Pa. : Pennsylvania Bureau of Topographic and Geologic Survey, 1982
Harrisburg, Pa. : Pennsylvania Bureau of Topographic and Geologic Survey, 1982
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11
12
由 Ashmead, Dever C. (Dever Campbell), 1884-
[Harrisburg] : Dept. of Forests and Waters, Topographic and Geologic Survey 1926
[Harrisburg] : Dept. of Forests and Waters, Topographic and Geologic Survey 1926
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由 Chance, H. M. (Henry Martyn), 1856-1937
Harrisburg, Pa. : published by the Board of Commissioners for the Second Geological Survey, 1883
Harrisburg, Pa. : published by the Board of Commissioners for the Second Geological Survey, 1883
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16
17
[New York] : A & E Television Networks, 2002
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18
由 Saadoun, Sarah
[New York, N.Y.] : Human Rights Watch, 2018
[New York, N.Y.] : Human Rights Watch, 2018
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19
由 Thakur, Pramod
Kent : Elsevier Science & Technology, 2018
Kent : Elsevier Science & Technology, 2018
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20
由 Ilsley, L. C. (Lee Clyde), 1880-
Washington, D.C. : U.S. Dept. of the Interior, Bureau of Mines, 1920
Washington, D.C. : U.S. Dept. of the Interior, Bureau of Mines, 1920
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