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Environmental aspects
132
Mines and mineral resources
83
History
73
Geology
67
Aspect de l'environnement
49
Oil-shales
49
Water quality
43
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1
Washington, DC : American Chemical Society, 1966
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Conference Proceeding
圖書
2
Washington, DC : American Chemical Society, 2002
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圖書
3
4
5
由 Obert, Leonard, 1906-, Merrill, Robert H.
[Washington, D.C.] : United States Department of the Interior, Bureau of Mines, 1958
[Washington, D.C.] : United States Department of the Interior, Bureau of Mines, 1958
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Government Document
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6
Reston, Va. : American Society of Civil Engineers, 2011
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Conference Proceeding
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7
Washington, DC : American Chemical Society, 1981
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Conference Proceeding
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8
由 Fetchenhier, Scott
[Place of publication not identified] : [publisher not identified], 1999
[Place of publication not identified] : [publisher not identified], 1999
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圖書
9
10
Denver : Legislative Council, 1968
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圖書
11
Oley, Pa. : Bullfrog Films, 2009
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未知
12
13
由 Smith, Duane A.
Albuquerque : University of New Mexico Press, 1980
Albuquerque : University of New Mexico Press, 1980
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圖書
14
由 Clark, Welling S.
Colorado Springs, CO (1102 W. Pikes Peak Ave., Colorado Springs 80904) : W.S. Clark, 1992
Colorado Springs, CO (1102 W. Pikes Peak Ave., Colorado Springs 80904) : W.S. Clark, 1992
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15
由 Mallory, William W.
Denver : Rocky Mountain Association of Geologists, 1977
Denver : Rocky Mountain Association of Geologists, 1977
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圖書
16
Washington, DC : American Chemical Society, 2011
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圖書
17
Reston, Va. : American Society of Civil Engineers, 2013
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Conference Proceeding
圖書
18
由 Gavin, Martin Joseph, 1894-
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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Government Document
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19
由 Heistand, R. N.
Washington, D.C. : Springfield, Va. : The Office ; Available from National Technical Information Service, 1980
Washington, D.C. : Springfield, Va. : The Office ; Available from National Technical Information Service, 1980
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Government Document
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20
由 Singewald, Q. D. (Quentin Dreyer), 1902-1987, Butler, B. S. (Bert Sylvenus), 1877-1960
Washington : Govt. Print. Off., 1941
Washington : Govt. Print. Off., 1941
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Government Document
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