Author: | Breckenridge, L. P. |
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Additional Authors: | Kreisinger, Henry |
Year: | 1912 |
Document Type: | N/A |
SUDOC: | I 28.3:23 |
Series: | United States Bureau of Mines Reports |
Report Number: | Bulletin 23 |
Subject: | Coal -- Testing. |
Link: | http://digital.library.unt.edu/ark:/67531/metadc38736/ |