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History
30
Railroads
11
Histoire
8
Coal mines and mining
6
Pollution
6
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1
2
por George, J. N. (John Nigel), 1903-1942
Harrisburg, Pa., Stackpole Co. 1947
Harrisburg, Pa., Stackpole Co. 1947
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Libro
3
por Lewis, Peter M. H.
New York, Funk & Wagnalls 1968
New York, Funk & Wagnalls 1968
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Libro
4
por Rice, George S. (George Samuel), 1866-1950
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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Documento de Gobierno
Libro
5
por Devereux, Roy, 1877-
New York, Oxford university press, 1936
New York, Oxford university press, 1936
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Libro
6
por Gibson, Walcot, 1864-1941
London : E. Arnold, 1920
London : E. Arnold, 1920
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Libro
7
por Anderson, Charles
Oxford ; Boston : Butterworth Heinemann, 1991
Oxford ; Boston : Butterworth Heinemann, 1991
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Libro
8
por Rice, George S. (George Samuel), 1866-1950
[Washington, D.C.] : Bureau of Mines, Department of Interior, 1920
[Washington, D.C.] : Bureau of Mines, Department of Interior, 1920
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Documento de Gobierno
Libro
9
10
11
12
por Blower, Alan
London, I. Allan 1964
London, I. Allan 1964
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Libro
13
14
15
por Gifford, Colin T.
London, Allan, 1970
London, Allan, 1970
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Libro
16
17
por Wydler, John W.
Washington : U.S. G.P.O., 1980
Washington : U.S. G.P.O., 1980
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Documento de Gobierno
Libro
18
por Acworth, Sir William Mitchell, 1850-1925
London, J. Murray, 1889
London, J. Murray, 1889
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Libro
19
por Butterell, Robin Darker, 1924-
London, Allan 1966
London, Allan 1966
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Libro