 | Charles G. Cunningham, Denis E. Marchand, Harold J. Prostka, James George Evans, John Calvin Reed, Thomas August Steven, Alan Allwardt, J. C. Antweiler, Robert Sumner Sigafoos, Carl L. Bieniewski, George Wescott Fisher - 1980 - عدد الصفحات: 408
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 | 1949 - عدد الصفحات: 378
The geology and fuel resources of a part of the Powder River Basin. | |
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