A study of falls of roof and coal, Rock Springs Coal District, Sweetwater County, Wyo. / by H. Tomlinson.
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| Format: | Government Document Book |
| Language: | English |
| Published: |
[Washington, D.C.] :
United States Bureau of Mines,
1933.
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| Series: | Report of investigations (United States. Bureau of Mines) ;
3207. |
| Subjects: |