Author: | Griffith, Franklin E. |
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Year: | 1943 |
Document Type: | N/A |
SUDOC: | I 28.23:3734 |
Series: | United States Bureau of Mines Reports |
Report Number: | R. I. 3734 |
Subjects: | Coal mines and mining. |
Mines and mineral resources -- Equipment and supplies. | |
Link: | http://digital.library.unt.edu/ark:/67531/metadc38430/ |