Analyses of mine and car samples of coal collected in the fiscal years 1911 to 1913.
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| Main Author: | |
|---|---|
| Other Authors: | , , |
| Format: | Book |
| Language: | English |
| Published: |
Washington :
Govt. print. off,
1914.
|
| Series: | Bulletin (United States. Bureau of Mines) ;
85. |
| Subjects: |