Author: | Crump, Lulie H. |
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Year: | 1969 |
Document Type: | N/A |
Series: | United States Bureau of Mines Reports |
Report Number: | I. C. 8411 |
Subjects: | Coal -- United States -- Statistics. |
Natural gas -- United States -- Statistics. | |
Petroleum -- United States -- Statistics. | |
Link: | http://digital.library.unt.edu/ark:/67531/metadc170806/ |