Engineering & TechnologyMethods of development and pillar extraction in mining the Pittsburgh coal bed in Pennsylvania, West Virginia, and OhioJ. W Paul![Methods of development and pillar extraction in mining the Pittsburgh coal bed in Pennsylvania, West Virginia, and Ohio]()
Methods of development and pillar extraction in mining the Pittsburgh coal bed in Pennsylvania, West Virginia, and Ohio
J. W Paul
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“Methods of development and pillar extraction in mining the Pittsburgh coal bed in Pennsylvania, West Virginia, and Ohio” by J. W Paul: a public-domain book…
Catalogue details
- Author
- J. W Paul
- Category
- Engineering & Technology
- Language
- English
- Source
- HathiTrust