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The sampling of coal in the mine,
| Author: | Holmes, J. A. |
|---|---|
| Year: | 1918 |
| Issuing Agency: | Govt. Print. Off., |
| Series: | United States. Bureau of Mines. Technical paper ; |
| Report Number: | 1 |
| Subject: | Coal--Testing |
| Links: | https://hdl.handle.net/2027/uc1.$b32421 |
| https://hdl.handle.net/2027/mdp.39015077560566 | |
| https://hdl.handle.net/2027/uc2.ark:/13960/t41r6p423 |
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