Additional Authors: | Hartmann, Irving., Nagy, John., Greenwald, H. P., Howarth, H. C. |
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Year: | 1949 |
Document Type: | USBM |
Issuing Agency: | U.S. Govt. Print. Off., Bureau of Mines, |
SUDOC: | I 28.7:716 |
Series: | Technical paper / Bureau of Mines ; |
Report Number: | 716 |
Subject: | Coal mines and mining--Explosives |
Links: | https://hdl.handle.net/2027/mdp.39015078485961 |
https://hdl.handle.net/2027/mdp.39015086471037 |