Author: | Ash, S. H. (Simon Harry), b. 1889 |
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Additional Authors: | Kynor, H. D., Eaton, W. L., Link, Howard B., Jenkins, Hayden E., James, H. M., Gilbert, Joseph C., Kennedy, D. O. |
Year: | 1950 |
Document Type: | N/A |
SUDOC: | I 28.23:4700 |
Series: | United States Bureau of Mines Reports |
Report Number: | R. I. 4700 |
Subjects: | Anthracite coal -- Pennsylvania. |
Mine pumps. | |
Link: | http://digital.library.unt.edu/ark:/67531/metadc38541/ |