Timbering regulations in certain coal mines of Pennsylvania, West Virginia, and Ohio.
| Other Authors: | , , |
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| Format: | Government Document eBook |
| Language: | English |
| Published: |
[Washington?] :
U.S. Government Printing Office,
1930.
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| Series: | Mines Bur. Technical Paper No. 485
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| Subjects: | |
| Online Access: | Connect to the full text of this electronic document |
| Item Description: | [Abstracts of, and extracts from, mine roof support laws, by State] Record is based on bibliographic data in ProQuest U.S. Executive Branch Documents, 1910-1932. Reuse except for individual research requires license from ProQuest, LLC. Electronic resource. |
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| Physical Description: | 1 online resource (iv, 41 pages) |
| Format: | System requirements: PDF reader software. |