Author: | Wallace, Joseph J. |
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Additional Authors: | Dowd, James J., Abernethy, R. F., Bowsher, John A. |
Year: | 1953 |
Document Type: | N/A |
SUDOC: | I 28.23:4998 |
Series: | United States Bureau of Mines Reports |
Report Number: | R. I. 4998 |
Subjects: | Coal mines and mining -- United States. |
Coal -- Pennsylvania -- Somerset County. | |
Link: | http://digital.library.unt.edu/ark:/67531/metadc38602/ |